The Google Display Network reaches over 90% of internet users across more than 2 million websites, apps, and Google properties. Running display ads with the correct banner dimensions is essential — wrong sizes get rejected, auto-cropped, or simply fail to win impressions in the most lucrative ad slots. This guide covers every standard Google Display Ad size for 2026, file requirements, and practical tips for getting the most out of your display creatives.
Top Performing Google Display Ad Sizes (The "Big 4")
Google recommends focusing on four banner sizes that cover the vast majority of available Display Network inventory. If you can only produce a handful of creatives, start here.
- 300×250 — Medium Rectangle: The single most common ad unit on the web. It appears in sidebars, within article content, and at the bottom of pages. This size consistently delivers the highest impression volume and is supported by virtually every publisher on the Display Network. Always create this size first.
- 728×90 — Leaderboard: The classic horizontal banner placed at the top or bottom of web pages. It is one of the most recognizable ad formats and benefits from prime real estate at page headers. High inventory across desktop placements.
- 160×600 — Wide Skyscraper: A tall, narrow vertical banner placed in sidebars. It stays visible as users scroll down long articles, giving it extended exposure time. Particularly effective for awareness campaigns on content-heavy sites.
- 300×600 — Half Page: One of the most visually impactful banner formats. It dominates its placement and drives strong engagement. Inventory is more limited than the medium rectangle, but click-through rates tend to be higher due to the large canvas available for your creative.
Together, these four sizes cover over 90% of available impressions on the Google Display Network. Uploading all four for every campaign is the single most effective way to maximize reach without producing dozens of separate creatives.
All Standard Google Display Ad Sizes
Beyond the Big 4, Google supports additional fixed-size banner formats for more specialized placements. Here is a complete reference of all standard sizes:
| Ad Name | Dimensions (px) | Notes |
|---|---|---|
| Medium Rectangle | 300×250 | Highest inventory; works in-content and in sidebars |
| Leaderboard | 728×90 | Page header/footer; dominant desktop format |
| Wide Skyscraper | 160×600 | Sidebar; stays visible on scroll |
| Half Page | 300×600 | High impact; premium sidebar placement |
| Large Rectangle | 336×280 | In-content; slightly larger than medium rectangle |
| Mobile Banner | 320×50 | Most common mobile format; anchored at top/bottom |
| Large Mobile Banner | 320×100 | Double-height mobile; more creative space |
| Banner | 468×60 | Legacy format; lower inventory on modern sites |
| Half Banner | 234×60 | Narrow legacy format; limited publisher support |
| Skyscraper | 120×600 | Narrow vertical; older format |
| Vertical Rectangle | 120×240 | Small vertical; niche placements |
| Small Square | 200×200 | Compact format; limited modern inventory |
| Square | 250×250 | Versatile square; works in some sidebar slots |
| Large Leaderboard | 970×90 | Wider leaderboard; premium header placements |
| Billboard | 970×250 | Very large horizontal; premium inventory only |
| Panorama | 980×120 | Wide horizontal; Scandinavian publisher standard |
| Triple Widescreen | 250×360 | Vertical format; niche placements |
| Portrait | 300×1050 | Tall premium format; very high viewability |
| Netboard | 580×400 | Nordic markets standard; limited global reach |
File Size and Format Requirements
Google enforces strict file requirements for Display Network banner ads. Uploading files that exceed these limits will result in immediate rejection.
- Maximum file size for static images (JPG, PNG, SVG): 5.12 MB. In practice, keep static ads under 200 KB so they load quickly on slower connections.
- Maximum file size for animated GIFs: 150 KB. This is significantly lower than the static limit because animated files loop continuously and large files slow page load noticeably.
- Supported formats: JPG, PNG, GIF, and SVG are all accepted. HTML5 ads (uploaded as ZIP) are also supported but require additional setup.
- Animated GIF rules: animations must not exceed 30 seconds total duration. The animation can loop, but looping must stop after 5 repetitions. Frame rate must be 5 frames per second or less.
- Text overlay limit: text and logos combined should not cover more than 20% of the image area. Heavy text causes lower quality scores and may trigger policy review.
Responsive Display Ads (RDAs)
Responsive Display Ads are the default format for Google Display campaigns. Instead of uploading fixed-size banners for each dimension, you provide image assets and Google automatically assembles and resizes them to fit any available placement — including sizes that fixed banners cannot cover.
For RDAs, upload images in two aspect ratios:
- Landscape image (1.91:1 ratio): minimum 600×314 px, recommended 1200×628 px. This is the primary image used for most horizontal and leaderboard placements. Upload at the recommended resolution to avoid quality degradation when Google crops or scales.
- Square image (1:1 ratio): minimum 300×300 px, recommended 1200×1200 px (or at least 600×600 px). Used for square placements and in-feed formats. A square image is required to unlock the full range of placements.
File format for RDA images: JPG or PNG only. Maximum 5 MB per image. Animated GIFs are not supported for Responsive Display Ads — only static images.
Tips for Google Display Ad Creatives
- Keep animated GIFs under 150 KB: this is the hard limit and also good practice for page performance. Use fewer frames, reduce color depth, and crop tightly to your subject to hit this target.
- Use JPG for photographs, PNG for text and logos: JPG compresses photographic content efficiently; PNG preserves crisp edges on graphics and text. Mixing the wrong format leads to either large file sizes (PNG for photos) or blurry text (JPG for graphics).
- Test multiple sizes simultaneously: upload the Big 4 sizes for every campaign. Google's auction system selects the best-fitting size for each placement. More sizes means more auctions entered and more potential impressions.
- Avoid white or transparent backgrounds for RDAs: pure white or transparent backgrounds can blend into publisher page backgrounds, making your ad invisible. Use a subtle brand-colored background or a thin border to ensure the ad stands out against any page design.
- Keep branding visible at small sizes: your logo and core message must be legible at 320×50 px. Design at the smallest size first, then scale up — not the other way around.
- Center your main subject: Google crops images when assembling RDAs. Keeping the focal point centered in both landscape and square crops avoids losing important visual elements.
How to Resize Images for All Banner Sizes
Preparing 15+ banner sizes from a single source image is time-consuming if done manually in desktop software. Use Picovert's free Image Resizer to set exact pixel dimensions for each banner size — no software installation required. Enter the width and height, choose whether to maintain aspect ratio or stretch to fit, and download the resized file immediately. Work through each banner size in the table above, starting with 300×250 and 728×90 to cover the most inventory first.
Compress Ads to Meet the 150 KB Limit
Animated GIFs must be under 150 KB and even static banners perform better when kept as small as possible. Use Picovert's free Image Compressor to reduce file size without visible quality loss. The compressor uses optimized lossy and lossless algorithms so you can typically reduce a 400 KB PNG banner to under 150 KB while keeping text and edges sharp. Run every banner through the compressor before uploading to Google Ads — smaller files load faster, improving ad viewability and your overall quality score.
Creating display ads that perform well comes down to three things: using the right dimensions so you qualify for every available placement, staying within file size limits so your ads are not rejected, and designing creatives that communicate clearly at even the smallest banner size. Start with the Big 4 sizes, follow Google's format rules, and use free tools to resize and compress your images before upload.