Online advertising has become one of the most effective ways to reach customers, and Google Ads Display Network plays a major role in this ecosystem. Businesses can place visual advertisements across millions of websites, mobile apps, and platforms.
One of the most important technical aspects of display advertising is banner size and proportion. If a banner is not created in the correct dimensions or aspect ratio, it may appear distorted, cropped, or rejected by advertising platforms.
This article explains all major Google Ads banner sizes, their proportions (aspect ratios), and best practices for designing responsive banner advertisements.
A banner size is defined by its width × height in pixels.
Example:
| Banner Size | Explanation |
|---|---|
| 300 × 250 | Width 300px, Height 250px |
| 728 × 90 | Width 728px, Height 90px |
| 160 × 600 | Width 160px, Height 600px |
The aspect ratio defines the proportional relationship between width and height.
Formula:
Aspect Ratio = Width ÷ Height
Example:
300 × 250
300 ÷ 250 = 1.2 : 1
This means the banner is slightly wider than tall.
Maintaining the correct aspect ratio ensures that images scale properly across devices and screens.
These banner sizes generate the majority of impressions on the Google Display Network.
| Ad Size | Name | Aspect Ratio |
|---|---|---|
| 300 × 250 | Medium Rectangle | 1.2:1 |
| 336 × 280 | Large Rectangle | 1.2:1 |
| 728 × 90 | Leaderboard | 8.09:1 |
| 300 × 600 | Half Page | 1:2 |
| 320 × 100 | Large Mobile Banner | 3.2:1 |
| 320 × 50 | Mobile Banner | 6.4:1 |
These sizes are highly recommended because they provide maximum ad inventory and better performance.
Google supports many standard banner sizes for desktop, tablet, and mobile devices.
| Size | Name | Ratio |
|---|---|---|
| 200 × 200 | Small Square | 1:1 |
| 240 × 400 | Vertical Rectangle | 3:5 |
| 250 × 250 | Square | 1:1 |
| 300 × 250 | Medium Rectangle | 6:5 |
| 336 × 280 | Large Rectangle | 6:5 |
These are commonly placed within website content areas.
| Size | Name | Ratio |
|---|---|---|
| 468 × 60 | Banner | 7.8:1 |
| 728 × 90 | Leaderboard | 8:1 |
| 970 × 90 | Large Leaderboard | 10.7:1 |
| 970 × 250 | Billboard | 3.88:1 |
| 980 × 120 | Panorama | 8.16:1 |
These appear at the top or bottom of webpages.
| Size | Name | Ratio |
|---|---|---|
| 120 × 600 | Skyscraper | 1:5 |
| 160 × 600 | Wide Skyscraper | 1:3.75 |
| 300 × 600 | Half Page | 1:2 |
| 300 × 1050 | Portrait | 1:3.5 |
These appear on website sidebars and provide large branding space.
With mobile traffic dominating the internet, mobile banner sizes are critical.
| Size | Name | Ratio |
|---|---|---|
| 300 × 50 | Mobile Banner | 6:1 |
| 320 × 50 | Mobile Banner | 6.4:1 |
| 320 × 100 | Large Mobile Banner | 3.2:1 |
| 300 × 100 | Mobile Banner | 3:1 |
These are optimized for smartphone screens and apps.
Google now prefers Responsive Display Ads.
Instead of fixed sizes, advertisers upload:
Images
Logos
Headlines
Descriptions
Google automatically generates ads for different placements.
Recommended image sizes:
| Type | Size | Ratio |
|---|---|---|
| Landscape | 1200 × 628 | 1.91:1 |
| Square | 1200 × 1200 | 1:1 |
| Logo Square | 1200 × 1200 | 1:1 |
| Logo Landscape | 1200 × 300 | 4:1 |
Responsive ads help maximize coverage across devices and placements.
If you have an image size:
240 × 400
Aspect Ratio:
240 ÷ 400 = 3:5
If the width is increased to 300, then:
300 × (5 ÷ 3) = 500
So the proportional size becomes:
300 × 500
Maintaining proportions prevents image distortion and layout breakage.
When creating banner ads, follow these technical limits.
| Requirement | Limit |
|---|---|
| Maximum file size | 150 KB |
| Supported formats | JPG, PNG, GIF, HTML5 |
| Animation length | 30 seconds |
| Loop limit | Unlimited allowed |
| Resolution | 72 DPI recommended |
Use:
Clear headline
One main image
Strong call-to-action
Example CTA:
Buy Now
Get Quote
Learn More
Avoid placing text near edges because some ad placements crop the banner.
Readable banners perform better.
Example:
Dark background + white text
Light background + dark text
Always include:
Logo
Brand colors
Consistent typography
According to industry data, the following sizes generate the highest impressions:
300 × 250
728 × 90
160 × 600
320 × 50
300 × 600
Creating these five sizes usually covers over 90% of ad placements.
Modern advertising is shifting toward:
Responsive ads
AI generated layouts
Dynamic creatives
Personalized display advertising
However, traditional banner sizes still remain essential for many websites and ad networks.
Understanding Google Ads banner sizes and their proportions is essential for successful display advertising. Using the correct dimensions ensures that ads appear properly across desktop, tablet, and mobile devices.
Advertisers who design banners in multiple recommended sizes gain higher impressions, better click-through rates, and improved ad performance.
Whether you are running campaigns on Google Display Network or other ad platforms, mastering banner dimensions and aspect ratios will significantly improve your digital marketing strategy.
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