Google Ads Display Ad Sizes: A Complete Guide

When running a Google Ads campaign, choosing the right display ad size can significantly impact your results. 

With multiple sizes available, knowing which ones work best can help maximize your reach and conversions. 

In this guide, we’ll break down everything you need to know about Google Display Ad sizes, from the most common dimensions to the best-performing options.

Why is Google Display Ad Size Important?

Google Display Ads appear across millions of websites, apps, and videos through the Google Display Network (GDN). 

The right ad size ensures your ads are shown in the most effective placements, increasing visibility and engagement.

Using optimized display ad sizes helps:

1. Improve ad placement opportunities
2. Increase impressions and click-through rates
3. Ensure ads appear correctly across devices
4. Enhance overall campaign performance

Choosing the wrong ad size might limit your reach, as not all websites support every dimension. That’s why understanding the most common and best-performing sizes is crucial.

Most Common Display Ad Sizes

Google Display Ads come in various dimensions. Here are the most commonly used sizes:

• Medium Rectangle (300×250) – Ideal for sidebar or in-content ads, offering a good balance of visibility and performance. 
• Large Rectangle (336×280) – Similar to the medium rectangle but slightly larger, increasing its impact. 
• Leaderboard (728×90) – A top-performing ad size often placed at the top of web pages.
• Half Page (300×600) – Also known as a “large skyscraper,” it offers more visual real estate, making it highly engaging. 
• Large Mobile Banner (320×100) – Optimized for mobile devices, ensuring better visibility on small screens. 
• Skyscraper (160×600) – A vertical ad commonly used in sidebars. 
• Square (250×250) & Small Square (200×200) – Flexible options that fit in various placements.

Best Performing Google Display Ad Sizes

While all ad sizes have their uses, some perform better than others. The best-performing display ad sizes include:

• 300×250 (Medium Rectangle) – One of the highest-performing ad sizes due to its versatility across desktop and mobile. 
• 728×90 (Leaderboard) – Great for visibility, especially when placed at the top of pages.
• 300×600 (Half Page) – Draws more attention due to its large size. 
• 320×100 (Large Mobile Banner) – Perfect for mobile-friendly campaigns.

These sizes provide optimal visibility, engagement, and conversion potential.

Traditional Display Ads vs Responsive Display Ads

Traditional Display Ads

These are static ads with fixed dimensions. You must create separate designs for each size, ensuring consistency across placements. While they offer more design control, they require more effort in setup and optimization.

Responsive Display Ads

These ads automatically adjust their size, appearance, and format to fit available ad spaces. You simply upload images, headlines, logos, and descriptions, and Google does the rest. This increases reach and efficiency, as Google optimizes your ads for the best performance.

Which One is Better?

• If you want more control over your ad design and branding, go for traditional display ads. 
• If you want a hassle-free, optimized approach, responsive display ads are the way to go.

Which Display Ad Size Should You Choose?

The best display ad size depends on your goals and audience. 

However, if you want maximum exposure, use a mix of the top-performing sizes: 300×250, 728×90, and 300×600.

For mobile-specific campaigns, focus on 320×100 and 300×250 to ensure optimal mobile visibility. 

If you’re running a responsive campaign, let Google automatically adjust sizes for different placements.

Conclusion

Selecting the right Google Display Ad size is crucial for maximizing your ad visibility and engagement. While common sizes like 300×250, 728×90, and 300×600 perform best, your choice should align with your campaign goals and target audience. 

For a streamlined approach, consider using responsive display ads to automatically optimize performance across different placements.

By leveraging the right ad sizes, you can improve your campaign’s effectiveness, increase conversions, and get the most out of your Google Ads investment.

That’s it! Hope you learn a lot from our Google Ads Experts in Sydney!