Google Display Ad Sizes
Every standard Google Display (IAB) ad size in 2026 with exact pixels — and which ones actually perform.
| Placement | Pixels | Ratio | |
|---|---|---|---|
| Medium rectangle Top performer; fits in-content and sidebar |
300×250 | 6:5 | |
| Large rectangle Higher visibility variant of 300×250 |
336×280 | 6:5 | |
| Leaderboard Top of desktop pages |
728×90 | 8:1 | |
| Half page Large sidebar; strong performer |
300×600 | 1:2 | |
| Wide skyscraper Sidebar |
160×600 | 4:15 | |
| Large mobile banner Mobile; double-height banner |
320×100 | 16:5 | |
| Mobile leaderboard Standard mobile banner |
320×50 | 32:5 | |
| Billboard Large premium desktop unit |
970×250 | ~4:1 |
Start with the four top performers
You don't need every size. The units that win the most impressions and revenue on the Google Display Network are 300×250 (medium rectangle), 336×280 (large rectangle), 728×90 (leaderboard) and 300×600 (half page). Add 320×50 and 320×100 for mobile coverage.
Responsive display ads scale for you
Google's responsive display ads take a few assets (landscape 1.91:1, square 1:1, logo) and auto-fit them to available slots. Upload a 1200×628 landscape and a 1200×1200 square and Google resizes to each placement.
File size and format
Keep each image under 150 KB. Use JPG or PNG for static and HTML5 for animated units; GIF animation must stop within 30 seconds.
FAQ
What are the most common Google Display ad sizes?
300×250, 336×280, 728×90, 300×600, 160×600, 320×50, 320×100 and 970×250. The top performers are 300×250, 336×280, 728×90 and 300×600.
What is the best performing Google Display ad size?
300×250 (medium rectangle) delivers the most impressions and is the most widely available slot, followed by 336×280 and 300×600.
What size should a responsive display ad image be?
Upload a 1200×628 landscape (1.91:1) and a 1200×1200 square (1:1); Google auto-resizes them to fit each placement.