Google Display Ad Sizes & Specs (2026)
The Google Display Network runs two kinds of image ads. Modern campaigns almost always use Responsive Display Ads, where you upload a few landscape (1.91:1), square (1:1) and portrait (4:5) images plus a logo, and Google auto-generates and resizes the ad to fit millions of placements. Uploaded (fixed) image ads still exist and give you pixel-perfect control, and a handful of IAB sizes — 300 × 250, 336 × 280, 728 × 90, 300 × 600 and 320 × 100 — account for the large majority of display inventory. Provide the responsive assets for reach, and add the top fixed sizes when a placement or brand demands exact layout.
Google Display ad specifications
| Placement | Dimensions (px) | Aspect ratio | Max file size | File types | Headline | Body text | Notes |
|---|---|---|---|---|---|---|---|
| Responsive — landscape | 1200 × 628 | 1.91:1 | 5120 KB | JPG, PNG, GIF | 30 chars | 90 chars | Primary responsive marketing image. Min 600 × 314. |
| Responsive — square | 1200 × 1200 | 1:1 | 5120 KB | JPG, PNG, GIF | 30 chars | 90 chars | Required alongside landscape. Min 300 × 300. |
| Responsive — portrait | 960 × 1200 | 4:5 | 5120 KB | JPG, PNG, GIF | 30 chars | 90 chars | Optional portrait asset for vertical placements. |
| Logo (square) | 1200 × 1200 | 1:1 | 5120 KB | JPG, PNG, GIF | — | — | Required. Also supply a 1200 × 300 (4:1) landscape logo. |
| Fixed — medium rectangle | 300 × 250 | 6:5 | 150 KB | JPG, PNG, GIF | — | — | Highest-volume display size across the web. |
| Fixed — large rectangle | 336 × 280 | 6:5 | 150 KB | JPG, PNG, GIF | — | — | Higher-impact variant of the medium rectangle. |
| Fixed — leaderboard | 728 × 90 | 8:1 | 150 KB | JPG, PNG, GIF | — | — | Top-of-page desktop banner. |
| Fixed — half page | 300 × 600 | 1:2 | 150 KB | JPG, PNG, GIF | — | — | Large sidebar unit with strong viewability. |
| Fixed — large mobile banner | 320 × 100 | 16:5 | 150 KB | JPG, PNG, GIF | — | — | Primary mobile banner size. |
Last verified July 5, 2026. Specs change often — always confirm against the official sources below before shipping.
Tips for Google Display ad creative
- For Responsive Display Ads, upload at least one landscape 1200 × 628 (1.91:1), one square 1200 × 1200 (1:1) and a logo (1:1 and 4:1) — the more assets, the more placements you win.
- If you build fixed banners, prioritize 300 × 250, 336 × 280, 728 × 90, 300 × 600 and 320 × 100 — these five cover most inventory.
- Each fixed image ad must be 150 KB or less; responsive image assets can be up to 5120 KB.
- Responsive headlines are limited to 30 characters (short) / 90 (long) and descriptions to 90 characters — write them to stand alone in any combination.
Google Display ad size FAQ
What sizes are Google display ads?+
Google display ads come in two forms. Responsive Display Ads use landscape 1200 × 628 (1.91:1), square 1200 × 1200 (1:1) and portrait 960 × 1200 (4:5) images. Fixed image ads use IAB sizes, most importantly 300 × 250, 336 × 280, 728 × 90, 300 × 600 and 320 × 100 pixels.
What are the best Google display ad sizes in 2026?+
The five highest-performing fixed sizes are 300 × 250 (medium rectangle), 336 × 280 (large rectangle), 728 × 90 (leaderboard), 300 × 600 (half page) and 320 × 100 (large mobile banner). For the widest reach, use Responsive Display Ads, which resize automatically to fit almost any placement.
What is the maximum file size for a Google display ad?+
Fixed image display ads must be 150 KB or less. Responsive Display Ad image assets can be up to 5120 KB (5 MB) each. Accepted formats are JPG, PNG and GIF.
What is a Responsive Display Ad?+
A Responsive Display Ad is a single ad where you upload a few images, logos, headlines and descriptions, and Google automatically combines and resizes them to fit any placement across the Display Network. It replaces the need to design dozens of individual fixed banners.
Do I still need fixed-size banners for Google Display?+
Not usually. Responsive Display Ads cover the vast majority of inventory. Fixed banners are worth building when you need pixel-perfect brand layout or want to target specific high-value placements that favor a particular size.
Official sources
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