- Static display banners require exact IAB pixel dimensions. 300x250, 728x90, and 160x600 are the most widely used.
- Responsive display ads need both landscape (1.91:1, min 600x314 px) and square (1:1, min 300x300 px) images at up to 5 MB.
- Performance Max asset groups require at least 3 landscape images, 3 square images, and 1 portrait image per Google's Ads Help Center.
- YouTube accepts video from 426x240 up to 3840x2160. Upload your best quality and YouTube handles the rest.
- Coinis Revise Smart Resize generates every required crop from one source image in seconds.
Getting ad dimensions wrong means a rejected upload or a cropped creative. Here are the exact specs for every major Google ad format, organized by placement type.
---
Google Display Ad Sizes (Uploaded Banner Ads)
Uploaded display banners need exact pixel dimensions. Google does not accept custom sizes or scaled high-DPI versions.
Most common banner ad sizes
These are the standard IAB sizes Google accepts for uploaded display ads:
| Ad name | Dimensions |
|---|---|
| Medium Rectangle | 300 × 250 px |
| Large Rectangle | 336 × 280 px |
| Leaderboard | 728 × 90 px |
| Wide Skyscraper | 160 × 600 px |
| Half Page | 300 × 600 px |
| Large Mobile Banner | 320 × 100 px |
| Mobile Banner | 468 × 60 px |
Best-performing display ad dimensions
The five most-used sizes are Medium Rectangle (300 × 250), Large Rectangle (336 × 280), Leaderboard (728 × 90), Half Page (300 × 600), and Large Mobile Banner (320 × 100). These appear on the highest volume of Display Network placements, so prioritize them first.
File format and size requirements
Static uploaded image ads must be 150 KB or smaller. Accepted formats are JPEG, PNG, and non-animated GIF. Anything outside those exact pixel dimensions or that file size cap will be rejected at upload.
Animated GIFs must run 30 seconds or less at 5 FPS or slower to comply with Google Ads policy.
---
Responsive Display Ad Specifications
Responsive display ads (RDAs) let Google mix, resize, and adapt your assets across Display Network placements automatically. You supply the raw images. Google handles the layout.
Image aspect ratios for responsive ads
Per Google's Ads Help Center, RDAs require two core aspect ratios:
- Landscape: 1.91:1, minimum 600 × 314 px
- Square: 1:1, minimum 300 × 300 px
- Portrait (optional): 9:16
You can upload up to 15 images spread across all three ratios.
Recommended image dimensions
The maximum file size per image is 5,120 KB (5 MB), per Google's Ads Help Center. Shoot for the highest resolution you can supply. Wider, higher-resolution images give Google more flexibility when adapting to different placements and screen sizes.
Both landscape and square logos are recommended in addition to the main images. Logo aspect ratios accepted are 1:1 and 4:1.
How Google resizes responsive images
Google's system selects the best crop and ratio for each individual ad slot. That is why providing both landscape and square images matters. Supply only one ratio and your ad simply won't appear in placements that require the other.
---
Search Ads and Performance Max Image Dimensions
Search ads are primarily text. But image assets attached to search campaigns, and all Performance Max asset groups, do require correctly sized images.
Responsive search ads image requirements
RSAs themselves carry no image. Headlines are capped at 30 characters and descriptions at 90 characters, per Google's Ads Help Center. If you attach image assets to a search campaign, those images must be 300-650 px wide and 300-1,000 px tall. Accepted formats are JPEG, PNG, and non-animated GIF. Max file size is 1 MB per image.
Performance Max image specs
Per Google's Ads Help Center for Performance Max campaigns:
- Landscape (1.91:1): 3 images minimum required
- Square (1:1): 3 images minimum required
- Portrait (9:16): 1 image minimum required
- Max file size: 5 MB
- Accepted formats: JPG, PNG
- Safe zone: keep key content inside the center 80% of each image
A complete PMax asset group also needs at least 1 video asset, 15 headlines, and 5 descriptions.
Square vs. landscape vs. portrait formats
Provide all three aspect ratios. Google picks the best fit per placement automatically. Skip portrait and your creative misses vertical mobile placements entirely.
---
YouTube Ad Video Dimensions
YouTube handles transcoding on its end. You do not need to export separate files per resolution.
YouTube video ad resolution options
Upload the highest quality version you have. YouTube accepts all of these resolutions:
- 426 × 240 px (240p)
- 640 × 360 px (360p)
- 854 × 480 px (480p)
- 1,280 × 720 px (720p)
- 1,920 × 1,080 px (1080p)
- 2,560 × 1,440 px (1440p)
- 3,840 × 2,160 px (2160p / 4K)
Video format requirements
Accepted formats include MP4, MOV, AVI, WMV, FLV, WebM, and MPEG-4. Upload directly to YouTube first, then link the video inside Google Ads.
For skippable in-stream ads, viewers can skip after 5 seconds. Bumper ads cap at 6 seconds and are non-skippable. Non-skippable in-stream ads run 7-15 seconds for standard placements, per Google's Ads Help Center.
Desktop vs. mobile video dimensions
There is no separate file for desktop vs. mobile. YouTube adapts your video for every device. Shooting in 16:9 at 1,920 × 1,080 px covers the widest range of placements at the highest quality.
---
Quick Tips for Google Ad Sizing Success
File size and format best practices
Static display banners: 150 KB max. Responsive display and Performance Max images: 5 MB max. Compress without losing visible quality. Blurry or pixelated creatives hurt performance even when they pass the upload check.
Aspect ratio considerations
Minor ratio mismatches on responsive formats may pass with a small tolerance. Uploaded static banners require exact pixel-perfect dimensions. When in doubt, crop to the exact size before uploading.
When to use static vs. responsive ads
Static banners give full creative control over layout, typography, and framing. Responsive ads scale across far more placements but hand layout decisions to Google's algorithm. Running both formats, where your budget allows, typically covers the most inventory.
---
Or let Coinis do it.
From a product URL to a live Meta campaign. AI-generated creatives. On-brand copy. Direct publish to Facebook and Instagram. Real performance reporting. All in one platform.
Start free. Upgrade when you're ready.
15 AI tokens a month. No credit card.
Frequently Asked Questions
What is the most common Google display ad size?
The Medium Rectangle at 300 × 250 px is the most widely served Google display ad size. It appears across the highest volume of Display Network placements. The Leaderboard (728 × 90 px) and Half Page (300 × 600 px) are also high-reach options to prioritize.
What file size limit applies to uploaded Google display ads?
Static uploaded image ads must be 150 KB or smaller. Responsive display ad images and Performance Max images allow up to 5 MB (5,120 KB) per image.
Does Google require different image sizes for Performance Max?
Yes. Per Google's Ads Help Center, Performance Max asset groups require at least 3 landscape images (1.91:1 ratio), 3 square images (1:1 ratio), and 1 portrait image (9:16 ratio). The max file size per image is 5 MB and key content should stay in the center 80% safe zone.
What video formats does YouTube accept for ads?
YouTube accepts MP4, MOV, AVI, WMV, FLV, WebM, and MPEG-4. Upload directly to YouTube first, then connect the video in Google Ads. YouTube handles transcoding automatically. You do not need separate files for each resolution.