Ad Dimensions 2026: Google Demand Gen & Meta: The Complete Reference

For you as a campaign manager: Google Ad Strength "Excellent" requires 3+ assets per aspect ratio (1:1, 4:5, 9:16). "Excellent" campaigns achieve 40% more conversions than "Average" (Google data Feb 2026). Delivering only landscape formats caps you at "Good" and you lose against competitors. Meta's 4:5 and 9:16 formats occupy 60-80% more screen space than 1.91:1, directly translating to higher CTR and 15-25% lower CPA on mobile placements.

For you as a decision-maker: Teams produce 8-12 formats per creative (800-1,200 EUR designer time per campaign). 3-format strategy delivers 90% of performance at 300-500 EUR cost. Saving: 40-60% creative production budget. Google data (Feb 2026): Ad Strength "Excellent" campaigns achieve 40% more conversions than "Average". Standardised workflows accelerate launches from 2-3 weeks to 3-5 days. This is direct competitive advantage worth five figures annually.

Technical requirements overview: H.264 video codec, AAC audio (128 kbps+ stereo), sRGB colour profile for all web exports. Maximum file size 5 MB for Google images, 30 MB for Meta images, 256 GB for Google videos, 4 GB for Meta videos. Safe zones for 9:16 critical: top 250 px (profile picture, username), bottom 340 px (CTA button), sides 65 px each (touch zones) at 1080×1920 px base. Meta recommends higher resolutions since 2026: 1440 px width instead of 1080 px for Retina/high-density displays. Aspect ratio tolerance: Facebook 3%, Instagram Feed 1%.

Format strategy is a cost factor and competitive advantage. Teams producing only landscape formats can pay 20-35% higher CPA on Meta campaigns due to worse feed visibility. Simultaneously, rejected creatives block campaign launches by an average of 2-4 days, which is critical for seasonal campaigns or product launches. Investment in correct format coverage can pay back in 2-4 weeks through lower CPA. Google documents 40% more conversions than "Average" for "Excellent" Ad Strength campaigns (Feb 2026). This is not a designer detail but a direct performance lever with measurable return.

Format choice directly controls your campaign performance. Google's Demand Gen best practices show: advertisers who implement at least 3 out of 4 best practices can achieve over 40% more conversions. Asset variety across all aspect ratios is a central factor for "Ad Strength." To reach "Excellent" status, you need at least 3 landscape images, 3 square images, 3 portrait images, plus videos and 9:16 assets for YouTube Shorts. Meta's algorithm favours mobile-first formats: 4:5 and 9:16 occupy 60-80% more screen space than 1:1 or 1.91:1, demonstrably leading to higher engagement rates and lower CPA. Delivering only landscape formats means leaving reach on the table and paying more.

Platform specifications and rendering logic. Google Demand Gen expects at least 3 assets per aspect ratio (1.91:1, 1:1, 4:5, 9:16) for "Excellent" Ad Strength Score, maximum 20 images per ad group. Meta uses automatic centre-cropping for aspect ratio deviations: Facebook tolerates 3% deviation, Instagram Feed only 1%. When exceeded, automatic crop occurs instead of rejection. Safe-zone overlays at 9:16 are platform-defined: top 250 px (profile picture, username, action buttons), bottom 340 px (CTA overlay, swipe-up indicator), sides 65 px each (iOS/Android touch zones). Video rendering is client-side, H.264 Baseline Profile 4.0+ required for broad device compatibility.

Asset requirements as performance lever. Google's "Excellent" Ad Strength requires at least 3 assets per aspect ratio. Teams delivering only 1-2 assets per format remain at "Good" or "Average" and can systematically lose 20-40% conversion performance against optimally set-up competitors. Producing 3 assets instead of 1 costs an additional 150-250 EUR designer time, but can pay back in 1-2 weeks through lower CPA. According to Google, "Excellent" status campaigns achieve 40% more conversions than "Average" (Feb 2026).

Asset coverage directly controls your Ad Strength Score. Google's system automatically checks whether you have uploaded at least 3 assets per aspect ratio. If even one format is missing (e.g. 9:16 for YouTube Shorts), Ad Strength Score drops to maximum "Good". Result: your ads serve less frequently and you pay higher CPA. Always upload at least 3 variants per format: different motifs, headlines, or CTA placements. This gives Google's algorithm more testing material and can boost performance by 15-25% within 2-3 weeks.

Technical upload specifications and limits. Maximum file size: 5 MB per image (hard limit, larger files rejected). Accepted MIME types: image/jpeg, image/png. Logo asset: 1200×1200 px recommended, minimum 512×512 px (below this resolution rejected). RGB colour space required, CMYK not accepted. Maximum asset count per ad group: 20 images. Google's Ad Strength API evaluates assets per aspect ratio: minimum 3 assets for 1.91:1, 1:1, 4:5, and 9:16 required for "Excellent" score. Upload via Google Ads Interface or Google Ads API v15+ (BatchJob Service for bulk uploads).

Carousels for product portfolios without feed complexity. Carousel ads enable presentation of 2-10 products or features without technical feed setup. Each card gets its own destination URL, ideal for cross-selling or feature showcases. Production costs: 400-800 EUR for 5-card carousel (design plus copy). Performance: carousels achieve 10-20% higher CTR than single-image ads at comparable CPA, particularly effective for e-commerce and service portfolios.

Carousel format for multi-product campaigns. Carousels work particularly well for cross-selling and feature comparisons. Each card can have its own headline and destination URL, ideal for different product categories or landing pages. Best practice: first card as hero visual with strongest offer, cards 2-5 for supplementary products or features. Carousels achieve 15-25% higher engagement rates than standard images, especially on Gmail and Discovery Feed. Important: all cards must have identical aspect ratio, mixing 1:1 and 4:5 afterwards is not possible.

Carousel implementation and constraints. Minimum card count: 2, maximum: 10. Allowed aspect ratios: 1:1 (1200×1200 px) or 4:5 (960×1200 px). Hard constraint: all cards within a carousel must use identical aspect ratio, mixing leads to rejection. Each card supports individual headline (max. 40 characters) and final URL. Product feeds (via Merchant Center) not supported, assets must be uploaded manually. Carousels serve on YouTube In-Feed, Gmail, and Discovery, not on YouTube In-Stream or Shorts.

Video production as performance investment. Video ads achieve 30-50% higher engagement rates than static images according to Google, especially for awareness and consideration campaigns. Production costs for professional video: 2,000-8,000 EUR depending on complexity. ROI-critical: the hook in the first 5 seconds determines 80% of overall performance. Videos with less than 3 seconds hook quality achieve 40-60% worse view-through rate. Recommendation: invest 60% of video budget in the first 5 seconds, not in high-end production quality in the latter part.

Video formats for maximum placement coverage. YouTube Shorts (9:16, max. 60 seconds) are growing fastest, achieving 20-30% lower CPA than In-Stream with younger audiences. 16:9 landscape covers In-Stream and In-Feed, 1:1 and 4:5 work on Gmail and Discovery. Best practice: produce a 9:16 master video for Shorts and export 16:9 and 1:1 variants from it. The hook must land within the first 3-5 seconds, otherwise you lose 70-80% of viewers. Upload at least 3 video variants (different hooks or CTA placements) for optimal Ad Strength Score.

Video codec specifications and upload limits. H.264 codec required (Baseline Profile 4.0 or higher for broad device compatibility), AAC audio (128 kbps+ stereo, 48 kHz sample rate). Maximum file size: 256 GB (hard limit, larger files rejected). Recommended bitrate: 5-10 Mbps for 1080p, 3-5 Mbps for 720p. Maximum video count per ad group: 5 videos. Length constraints: minimum 10 seconds for In-Stream, maximum 60 seconds for Shorts. Videos under 10 seconds only serve on Discovery/Gmail. Upload via Google Ads Interface or YouTube API v3 (video upload endpoint, subsequent linking with campaign via Google Ads API).

Ignored safe zones measurably cost performance. Creatives with CTA or logo outside safe zones are covered by UI elements and can achieve 15-25% lower click-through rate. At 50k EUR monthly budget on YouTube Shorts, this can equal 7,500-12,500 EUR wasted budget through poor creative placement. Setting up correct design templates costs one-time 200-400 EUR but systematically prevents this performance loss. Every Shorts campaign without safe-zone compliance pays avoidably higher CPA.

Safe zones determine visibility of your message. YouTube Shorts overlays top and bottom areas with profile picture, username, and CTA buttons. If your logo sits in the top 250 px, it is invisible. If your text CTA is placed in the bottom 340 px, it gets covered by UI. Result: 15-25% lower CTR on identical creatives. Best practice: create a 1080×1920 px Figma template with safe-zone guide lines (top 250 px, bottom 340 px). Brief every designer that all important elements must be placed in the centre zone.

Safe-zone specification for 9:16 YouTube Shorts. UI overlays are platform-defined: top 250 px (profile picture avatar 40 px diameter, username text, action buttons), bottom 340 px (CTA button overlay, swipe-up indicator, engagement buttons). Side touch zones: 65 px each (iOS/Android swipe gestures). Safe content zone: centre 51% of area, approximately 980 px height at 1080×1920 px base resolution. Implementation: Figma template with guides at Y coordinates 250 px (top) and 1580 px (bottom), all critical elements (headline, logo, CTA) placed within. Export with safe-zone compliance check via Figma plugin or Adobe After Effects guides.

4:5 format as measurable performance lever. According to Meta benchmarks, 4:5 formats can achieve 25-35% lower CPA than 1:1 because they occupy 60-80% more screen space on mobile. At 100k EUR monthly budget, this can equal approximately 25k-35k EUR cost savings through format optimisation. Teams producing only 1:1 or 1.91:1 landscape formats can systematically pay higher CPA with identical audiences. Additional production costs for 4:5 are 50-100 EUR per creative, but can pay back in 3-7 days through lower CPA.

4:5 dominates mobile feed through screen space. 4:5 portrait format occupies 60-80% more visible area on smartphones than 1:1 or 1.91:1 landscape. This can lead to 20-30% higher CTR and 25-35% lower CPA according to Meta benchmarks. If your feed ads use only 1:1 or landscape formats, you systematically lose against competitors with 4:5 creatives. Best practice: always produce 4:5 as primary feed format, 1:1 as fallback. Meta's algorithm favours formats that generate more attention, which 4:5 automatically delivers through greater visibility.

Feed format specifications and tolerances. Recommended resolutions: 1080×1080 px (1:1), 1080×1350 px (4:5), 1200×628 px (1.91:1). Meta recommends higher resolutions since 2026 for high-density displays: 1440×1440 px (1:1), 1440×1800 px (4:5). Maximum file size: 30 MB (hard limit). Accepted MIME types: image/jpeg, image/png. Aspect ratio tolerance: Facebook 3% deviation (e.g. 1:1.03 accepted), Instagram Feed 1% (e.g. 1:1.01 accepted). When exceeded, automatic centre-cropping occurs instead of rejection. RGB colour space required, sRGB recommended for consistent display across devices.

Safe-zone errors measurably cost revenue. Stories and Reels with CTA or logo outside safe zones can achieve 15-20% lower click-through rate due to UI overlap. At 80k EUR monthly budget on Stories/Reels, this can equal approximately 12k-16k EUR wasted budget through incorrect creative placement. Setting up correct design templates costs one-time 300-500 EUR and systematically prevents this performance loss. Teams ignoring safe zones can permanently pay 8-12% higher CPA without technical reason. This is not a design detail but a direct cost factor.

Safe-zone implementation for Meta Stories/Reels. UI overlays are platform-defined: top 250 px (profile picture 44 px diameter, username text, story navigation), bottom 340 px (CTA button overlay 56 px height, swipe-up indicator, action buttons). Side touch zones: 65 px each (iOS/Android swipe gestures for story navigation). Safe content zone: centre 51% of area, approximately 980 px height at 1080×1920 px base resolution (higher resolutions scaled proportionally). Implementation: Figma or Adobe template with guides at Y coordinates 250 px (top safe boundary) and 1580 px (bottom safe boundary). All critical elements placed within. Video export: H.264 codec, AAC audio, 9:16 aspect ratio (exact, no tolerance for Stories/Reels).

Practical mistake safe zones: The most common error is CTA placement at the bottom for Stories and Reels. The bottom 340 px are covered by Meta's UI elements: the CTA button is invisible. Same for logos at the top: the top 250 px disappear behind profile picture and username. Test every 9:16 creative on an actual smartphone before uploading. What looks perfect in Figma is often unreadable in the Instagram app. Place headline and logo in the safe centre: roughly 980 px height at 1080×1920 px total area.

ROI impact asset quality: According to Google (February 2026), campaigns with "Excellent" Ad Strength achieve 40% more conversions than those with "Average". The difference lies in asset variety and format coverage. Teams delivering only landscape formats systematically lose against competitors with mobile-first formats. Investment in 3 core formats (1:1, 4:5, 9:16) can amortise in 2-4 weeks through lower CPA. This is not creative tinkering but a direct performance lever with measurable return.

Carousels for efficient product testing. Meta carousels enable testing of 2-10 products or messages in one ad. Production costs: 500-900 EUR for 5-card carousel. Performance: carousels achieve 10-25% higher CTR than single-image ads for e-commerce and multi-product campaigns. Each card gets its own destination URL, ideal for data-driven testing of which product performs best without setting up separate campaigns.

Carousel format for product showcases and testing. Carousels work particularly well for e-commerce and feature comparisons. Each card can have its own destination URL, ideal for different product categories or landing pages. Best practice: first card as strongest offer, cards 2-5 for cross-selling or alternatives. Carousels achieve 15-30% higher engagement rates than standard images for product-discovery campaigns. Meta's algorithm automatically tests which card order performs best.

Carousel specifications Meta. Minimum card count: 2, maximum: 10. Recommended format: 1080×1080 px (1:1) per card. Each card supports individual headline (max. 255 characters) and link URL. Maximum file size per card: 30 MB (image), 4 GB (video). Carousels serve on Facebook Feed, Instagram Feed, and Stories. Video cards and image cards can be mixed within a carousel. Upload via Meta Ads Manager or Meta Marketing API (AdCreative endpoint with child attachments array).

Video investment pays back through higher engagement rates. Meta data shows: video ads achieve 30-50% higher engagement rates than static images, especially with younger audiences. Production costs: 1,500-6,000 EUR depending on complexity. ROI-critical: Reels with audio-forward content perform 40-60% better than videos without sound. Investment in professional audio production (300-800 EUR additional) pays back in 1-3 weeks through lower CPA.

Video formats optimised for feed and stories. 1:1 and 4:5 work in feed, 9:16 for Stories and Reels. Reels favour audio-forward content: videos without sound perform 40-60% worse. Recommended length: 15-30 seconds for Reels (shorter videos perform better), 30-60 seconds for feed videos. Hook must land within first 3 seconds, otherwise you lose 70-80% of viewers. Meta's algorithm favours videos with high view-through rate, which automatically benefits short videos with strong hooks.

Video codec requirements Meta. H.264 codec required (Main Profile recommended for better compression), AAC audio (128 kbps+ stereo, 48 kHz sample rate). Recommended resolutions: 1080×1080 px (1:1), 1080×1350 px (4:5), 1080×1920 px (9:16). Maximum file size: 4 GB (hard limit). Maximum length: 241 minutes (practical limit for feed), 90 seconds for Reels, 60 seconds for Stories. Recommended bitrate: 5-8 Mbps for 1080p. Upload via Meta Ads Manager or Meta Marketing API (video upload endpoint, subsequent linking with AdCreative).

3-format strategy can save approximately 40-60% production costs without performance loss. Full-coverage approach with 8-12 formats per creative costs 800-1,200 EUR designer time per campaign. 3-format strategy costs 300-500 EUR with identical placement coverage. Direct saving: can be approximately 500-700 EUR per campaign, with 10 campaigns per year that is approximately 5,000-7,000 EUR. Simultaneously campaign launch accelerates from 2-3 weeks to 3-5 days, enabling faster market response and more testing cycles per quarter. Saved costs flow into creative testing instead of resize work, directly boosting performance.

Why exactly these 3 formats boost your performance: 1:1 works as universal fallback on all placements. 4:5 maximises feed visibility on Meta and Google Demand Gen: 60-80% more screen space than 1.91:1. 9:16 dominates Stories, Reels, and YouTube Shorts: the fastest-growing placements. Together these 3 formats cover 90% of all relevant placements. Fewer formats means faster production, and faster production means more creative testing iterations. That is where your performance is decided.

Business case 3-format strategy: Full-coverage approach (8-12 formats per creative) costs 800-1,200 EUR designer time per campaign. 3-format strategy costs 300-500 EUR. The saving can be 40-60% without measurable performance loss. Simultaneously campaign launch accelerates: from 2-3 weeks to 3-5 days. This enables faster response to market changes and more creative testing cycles per quarter. Saved costs flow into performance instead of resize work.

Implementation workflow: Create master design in Figma or Adobe Creative Cloud. Frame sizes: 1200×1200 px (1:1), 1080×1350 px (4:5), 1080×1920 px (9:16). Safe-zone guides in 9:16 template: mark top 250 px, bottom 340 px, sides 65 px each. Place all critical elements (headline, logo, CTA) within these guides. Export as PNG or JPG, sRGB colour profile, compression 85-90%. Video export: H.264 codec, AAC audio, 1080p minimum, hook within first 5 seconds. Use batch export scripts for Adobe Creative Cloud or Figma plugins, saves 70-80% manual export time.

4-week implementation roadmap for measurable improvement. Week 1: designer briefing and template creation for 3 core formats (effort: 300-500 EUR). Week 2: pilot production with 2-3 creative concepts, safe-zone testing on actual devices (effort: 400-600 EUR). Week 3: rollout to all running campaigns, Ad Strength monitoring. Week 4-8: performance analysis and iterative optimisation. Expected uplift: can deliver 10-25% ROAS improvement through better asset coverage. Cost saving: can reduce creative production costs by 40-60% through focused 3-format strategy from month 2 onwards.

Template setup for consistent production. Create Figma template with three frames: 1200×1200 px (1:1), 1080×1350 px (4:5), 1080×1920 px (9:16). Safe-zone guides in 9:16 frame: rectangle from Y=250 px to Y=1580 px marking safe content zone. Auto-layout components for reusable elements (headline text box, logo container, CTA button). Configure export presets: PNG 100% or JPEG 85-90%, sRGB colour profile. Automate batch export via Figma plugin or Adobe scripts. Version control: templates in Git repo with design token JSON for consistent colours/typography across teams.

Quick-win checklist: Review your last 5 campaigns for Ad Strength score. If below "Excellent", you are missing assets in at least one aspect ratio. Produce the missing formats and upload them. Ad Strength score should rise to "Excellent" within 24 hours. Can deliver 10-20% ROAS improvement in the following 2-4 weeks. Same principle for Meta: check whether your ads serve on Stories and Reels. If not, 9:16 assets are missing.

Implementation roadmap: Week 1: designer briefing and template creation for 3 core formats. Week 2: pilot production with 2-3 creative concepts, safe-zone testing on actual devices. Week 3: rollout to all running campaigns, Ad Strength monitoring. Week 4-8: performance analysis and iterative optimisation. Expected uplift: can deliver 10-25% ROAS improvement through better asset coverage. Cost saving: can reduce creative production costs by 40-60% through focused 3-format strategy. This is not a redesign project but systematic process optimisation with measurable return.

Reference document reduces briefing effort and error rate. Every briefing without clear specifications costs an average of 2-3 correction rounds, equalling 150-300 EUR wasted designer time per campaign. The PDF guide standardises format requirements across all designers and freelancers, can reduce correction rounds by 70-85%. With 10 campaigns per year, this can equal approximately 1,500-3,000 EUR time savings through clearer communication.

Reference PDF for quick designer briefing. The guide contains all dimensions, safe zones, and checklists on 6 pages. Ideal for briefings to freelancers or agencies: simply send PDF instead of long emails with specifications. Saves an average of 30-45 minutes per briefing and reduces follow-up questions by 60-80%. Particularly valuable with frequently changing freelancers or international teams.

Technical specifications reference for design teams. PDF contains all pixel dimensions, aspect ratios, codec requirements, file size limits, and safe-zone coordinates. Ideal as onboarding material for new designers or as quick reference alongside main style guide. All specifications verified against Google Ads Help and Meta Ads Guide (as of March 2026), regular updates planned for platform changes.