📐Banner Ad Size Guide

Filter by platform to find the right banner ad dimensions for your campaign.

How to Choose Banner Ad Sizes

Banner ad dimensions depend on placement location, the advertising network, and the target device. The IAB (Interactive Advertising Bureau) maintains a standard set of sizes that most networks support. Designing to these standards maximizes placement availability and ad performance.

Start with These Three Sizes

If resources are limited, prioritize 300×250px (medium rectangle), 728×90px (leaderboard), and 300×600px (half page). These three formats cover approximately 80% of available placements on the Google Display Network and most major ad networks.

Design Tips

Keep file sizes under 150KB for Google Ads. Text should not dominate the image — most platforms flag ads with text covering more than 20% of the image area. Include a clear call-to-action (CTA) button with sufficient contrast against the background, and always test on both light and dark backgrounds.

Frequently Asked Questions

HTML5 animated vs. static image — which is better?

Animated HTML5 banners typically achieve higher CTR but cost more to produce and may be restricted on some networks. Static images are faster to produce and universally compatible. Choose based on your budget and campaign goals.

Do I need separate mobile banner sizes?

Yes. Mobile-specific sizes (320×50, 320×100) are essential for app and mobile web campaigns. Displaying a desktop banner on mobile significantly reduces legibility and performance.