TL;DR: For responsive display and Performance Max ads, Google wants 1200x628 (landscape) and 1200x1200 (square). Standard display banners use fixed sizes like 300x250, 728x90, and 160x600. File size limits are 5MB for responsive ads and 150KB for standard banners.
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Why Ad Resizing Matters in Google Ads
Wrong image dimensions cut your reach before your ad even runs. Google's Display Network spans millions of placements across websites, apps, and Gmail. Each placement has its own size requirements.
Different placements require different dimensions
A leaderboard banner needs 728x90. A medium rectangle needs 300x250. Responsive display ads use aspect ratios, not fixed sizes. One image will not cover all placements.
Wrong sizes limit your reach across the Display Network
Google skips placements where your image doesn't fit. Upload only one size and you lose impressions across every other slot. More sizes means more coverage.
Starting with correct specs saves time and quality loss
Resizing after the fact takes extra steps. Repeated resizing can also degrade image sharpness. Getting dimensions right before upload keeps your quality intact.
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Google Ads Image Dimensions by Ad Type
Per Google's Ads Help Center, specs vary by campaign type. Here's what each one requires.
Responsive Display Ads
Landscape: 1200x628 pixels (1.91:1 ratio). Square: 1200x1200 pixels (1:1 ratio). Minimum accepted sizes are 600x314 for landscape and 300x300 for square. Maximum file size is 5,120 KB.
Performance Max Ads
Performance Max uses the same aspect ratios as responsive display ads. Landscape minimum is 600x314. Square minimum is 300x300. Provide images at the recommended 1200x628 and 1200x1200 whenever possible for the best results across placements.
Standard Display Ad Sizes
Standard display ads use fixed dimensions. The three most common are 300x250 (medium rectangle), 728x90 (leaderboard), and 160x600 (wide skyscraper). Maximum file size for standard banners is 150KB.
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How to Resize Images Before Uploading to Google Ads
Prep your images before you open Google Ads. It's faster and avoids upload rejections.
Choose your ad type first
Responsive display, Performance Max, or standard image ad. Your choice determines which dimensions you need. Lock that in before touching your design tool.
Resize to the recommended dimensions
Set your canvas to the target size. For responsive and Performance Max, 1200x628 and 1200x1200 cover most placements. For standard display, resize to the exact banner dimensions required for each slot.
Verify file size is under the limit
Check before exporting. Responsive ad images must stay under 5,120 KB. Standard display banners must stay under 150KB. Files above the limit will be rejected on upload.
Export as JPG or PNG
Google accepts JPG, PNG, and GIF formats. JPG works well for photography. PNG handles logos and graphics with transparency.
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How to Upload and Size Ads in Google Ads Editor
Google Ads Editor is the native tool for managing image ads at scale.
Open Google Ads Editor and select your campaign
Download and open the Editor. Sign in, then select the campaign you want to update.
Create or select an ad group
Image ads live inside ad groups. Create a new one or pick an existing one from your campaign.
Choose your ad type
Select responsive display, Performance Max, or image ad. Each type has its own upload flow in the Editor.
Upload your sized images
Google shows a preview after each upload. You'll see how the image renders across placements. Per Google Ads Editor Help, the Editor does not support double-sized images (such as 640x100 for a 320x50 slot) for high-resolution displays.
Review how your ad appears across placements and devices
Check the preview panel before publishing. Confirm the image looks correct on both mobile and desktop placements.
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Using Google's Automatic Image Upscaling
Google Ads includes a built-in upscaling feature. It runs when your image falls below minimum size requirements.
What happens if your image is below minimum size
Per Google's Ads Help Center, if an uploaded image is too small, the built-in AI image upscaling enhancement automatically resizes and sharpens it. Your campaign can still run.
Google Ads AI automatically resizes and sharpens small images
The enhancement kicks in without any action from you. Google processes the image and scales it up to meet the minimum threshold.
Tradeoff: upscaling can affect quality
AI upscaling works well in most cases. But it can soften fine details or introduce artifacts at larger display sizes. Providing correctly sized images from the start gives you full control over output quality.
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Resize Faster with Coinis
Manual resizing across multiple dimensions is repetitive. Coinis cuts the back-and-forth.
Smart Resize in Revise auto-adjusts to Google ad dimensions
Smart Resize takes your existing image and outputs it at your target dimensions. Select the asset, pick the size, and it's ready to export. No manual canvas work.
Generate correctly sized images from scratch with Image Ads
The Image Ads workflow generates ad-ready creatives from a product URL. Images are built at the right proportions from the start. No separate resizing step required.
Save templates for consistent sizing across campaigns
Once your creative is sized and on-brand, your Brand Profile keeps the style consistent. Resize, generate, and export across every campaign without rebuilding from scratch.
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Or skip the steps.
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Frequently Asked Questions
What image size does Google Ads require?
For responsive display and Performance Max ads, Google recommends 1200x628 pixels (landscape) and 1200x1200 pixels (square). Standard display banners use fixed sizes, with the most common being 300x250, 728x90, and 160x600.
What is the file size limit for Google Ads images?
Responsive display ad images must be under 5,120 KB (5MB). Standard display banner images must be under 150KB. Files above these limits will be rejected on upload.
What happens if my image is too small for Google Ads?
Per Google's Ads Help Center, the built-in AI image upscaling enhancement automatically resizes and sharpens images that fall below the minimum size requirements. However, providing correctly sized images from the start produces better quality results.
Do I need separate images for different Google Ads placements?
For responsive display and Performance Max ads, uploading both a landscape (1200x628) and a square (1200x1200) image covers most placements. For standard display, you'll need images at each specific banner size you want to serve.