Display and banner ad sizes
Standard display and banner ad sizes are defined by the IAB (Interactive Advertising Bureau) and supported across the Google Display Network, programmatic ad exchanges, and most direct publishers. The same handful of dimensions covers nearly every banner placement on the web.
You don't need to design every size. Most teams start with the 300×250 medium rectangle, the 728×90 leaderboard, and the 160×600 wide skyscraper, then add mobile and premium formats as needed. All static display ads must be under 150KB. Google's responsive display ads can adjust to fit available placements automatically, but fixed-size banners give you precise control over layout and art direction.
Quick reference
| Format | Dimensions | Ratio | Max size |
|---|---|---|---|
| Medium Rectangle (300×250) | 300 × 250 px | 6:5 | 150KB |
| Leaderboard (728×90) | 728 × 90 px | 728:90 | 150KB |
| Wide Skyscraper (160×600) | 160 × 600 px | 4:15 | 150KB |
| Large Rectangle (336×280) | 336 × 280 px | 6:5 | 150KB |
| Mobile Banner (320×50) | 320 × 50 px | 32:5 | 150KB |
| Half Page (300×600) | 300 × 600 px | 1:2 | 150KB |
| Billboard (970×250) | 970 × 250 px | 97:25 | 150KB |
| Performance Max Assets | 1200 × 1200 px | 1:1 | 5120KB |
Medium Rectangle (300×250)300×250px
The 300×250 pixel medium rectangle is one of the most common display ad sizes. It works on both desktop and mobile and is often the first fixed-size creative teams design when building a display campaign.
The 300×250 medium rectangle is the most widely supported ad size across the Google Display Network, AdSense publisher sites, and programmatic ad exchanges. It typically appears within article content (between paragraphs), in sidebar positions, or at the end of articles. Its near-square proportions give designers enough space for both an image and a text message.
Dimensions
300 × 250 px
Aspect ratio
6:5
Max file size
150KB
Formats
JPG, PNG, GIF, HTML5
Best practices
- •This is the #1 priority ad size — design it first, then adapt to other sizes.
- •Keep the file under 150KB. Use JPG for photos, PNG for graphics with transparent elements.
- •Include a clear CTA button — this size often appears inline with article content, so the message needs to read quickly.
Leaderboard (728×90)728×90px
The 728×90 pixel leaderboard is the standard horizontal banner for desktop websites. It typically appears at the top of a page, above or below the navigation. It's the second most common display ad size after the 300×250 medium rectangle.
The 728×90 leaderboard is a desktop-only format — it's too wide for mobile screens (which use 320×50 or 320×100 instead). It dominates the top-of-page ad position on news sites, blogs, and forums. The wide, horizontal format is ideal for brand messaging with a logo, tagline, and CTA arranged left to right.
Dimensions
728 × 90 px
Aspect ratio
728:90
Max file size
150KB
Formats
JPG, PNG, GIF, HTML5
Best practices
- •Design for desktop only — mobile uses 320×50 instead. Always create both sizes for full coverage.
- •Use the horizontal space for a left-to-right flow: logo → message → CTA button.
- •Keep file size under 150KB. The narrow height (90px) means text must be 14px+ to be readable.
Wide Skyscraper (160×600)160×600px
The 160×600 pixel wide skyscraper is the standard vertical sidebar ad for desktop websites. It runs along the left or right side of the page content and remains visible as users scroll. The tall, narrow format is ideal for vertical product shots, step-by-step messaging, and brand impact.
The 160×600 wide skyscraper occupies sidebar positions on desktop websites. Many publishers implement it as a 'sticky' ad that remains fixed in the viewport as the user scrolls, giving it extended viewability compared to static placements. This makes it particularly effective for brand awareness campaigns.
Dimensions
160 × 600 px
Aspect ratio
4:15
Max file size
150KB
Formats
JPG, PNG, GIF, HTML5
Best practices
- •Use vertical stacking: logo top → image middle → CTA bottom. No horizontal layouts at 160px wide.
- •Many publishers display this as a sticky (scroll-fixed) ad — take advantage with sequential messaging.
- •Text must be 16px+ to be readable at 160px width. Keep headlines to 2-3 words per line.
Large Rectangle (336×280)336×280px
The 336×280 large rectangle is an expanded version of the 300×250 medium rectangle. It offers 20% more ad space and typically appears embedded within article content on desktop websites.
The 336×280 large rectangle is essentially a bigger version of the ubiquitous 300×250 medium rectangle. The extra 36×30 pixels give designers noticeably more room for product images, headlines, and CTA buttons. It appears in the same placements as 300×250 — within article content, between paragraphs, and at the end of articles.
Dimensions
336 × 280 px
Aspect ratio
6:5
Max file size
150KB
Formats
JPG, PNG, GIF, HTML5
Best practices
- •Design alongside 300×250 — same placement, 20% more space. Create both from one base layout.
- •This format is most commonly used within article content on desktop sites.
- •Keep under 150KB. The extra pixels vs 300×250 make file size management slightly tighter.
Half Page (300×600)300×600px
The 300×600 half page ad is a premium display format with twice the area of the standard 300×250 medium rectangle. It appears in sidebar positions on desktop websites and is one of the highest-impact standard display sizes. The large canvas allows for rich imagery, detailed product showcases, and multi-element layouts.
The 300×600 "half page" is one of the largest standard IAB ad sizes. It typically appears in sidebar positions on desktop websites, often replacing the 160×600 skyscraper or stacking above/below a 300×250 medium rectangle. The generous canvas makes it a favorite for brand awareness campaigns.
Dimensions
300 × 600 px
Aspect ratio
1:2
Max file size
150KB
Formats
JPG, PNG, GIF, HTML5
Best practices
- •Use the tall canvas for rich visuals — product showcases, lifestyle imagery, or multi-step storytelling.
- •Despite the large canvas, keep the file under 150KB. Use JPG compression aggressively for photos.
- •Design a 300×250 companion ad from the same creative for broader reach.
Billboard (970×250)970×250px
The 970×250 billboard is a premium wide-format display ad that spans the full width of many desktop web pages. It offers nearly 3× the area of a 728×90 leaderboard and is typically used on larger publisher layouts.
The 970×250 billboard sits at the top of desktop web pages, replacing or supplementing the 728×90 leaderboard position. At nearly 3× the area of a leaderboard, it commands attention and is commonly used for major brand campaigns, product launches, and tentpole advertising moments.
Dimensions
970 × 250 px
Aspect ratio
97:25
Max file size
150KB
Formats
JPG, PNG, GIF, HTML5
Best practices
- •Premium format with limited inventory — use for high-impact brand campaigns.
- •The 970px width spans full desktop pages. Use panoramic imagery or horizontal product lineups.
- •Always design a 728×90 fallback — not all top-of-page slots support 970×250.
Performance Max Assets1200×1200px
Performance Max does not take a single ad size. It takes an asset bundle — three image ratios, two logo ratios and video in three orientations — which Google assembles into ads across Search, Display, YouTube, Discover, Gmail and Maps. Three of those are required: horizontal 1.91:1 images, square 1:1 images, and a square 1:1 logo. Vertical 4:5 images and the horizontal 4:1 logo are optional.
Performance Max works differently from a fixed-size display banner. You supply a pool of assets and Google composes ads from it for whichever surface it is serving — so the requirement is coverage of the ratios rather than one perfectly sized creative.
Dimensions
1200 × 1200 px
Aspect ratio
1:1
Max file size
5120KB
Formats
JPG, PNG
Other documented sizes
Best practices
- •Required: horizontal 1.91:1, square 1:1, and a square logo. Everything else is optional but improves coverage.
- •Supply vertical 4:5 anyway — it is the shape that fills a phone in Discover and Gmail.
- •Supply your own video. Google auto-generates it from your images otherwise.
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Start designing →Frequently asked questions
What are the most common Google display ad sizes?
300×250 (medium rectangle), 728×90 (leaderboard), 160×600 (wide skyscraper), 320×50 (mobile banner), and 300×600 (half page). These cover the vast majority of display inventory.
Which ad size should I design first?
300×250 (medium rectangle). It works across desktop and mobile placements and is the most widely supported size on the Google Display Network.
What is the file size limit for display ads?
150KB for static image ads (JPG, PNG, GIF) on the Google Display Network. Animated GIFs must be 30 seconds or shorter.
What format should Google display ads be?
JPG for photo-based ads, PNG for graphics with text or transparency, GIF for simple animations. HTML5 for interactive ads. All static formats must be under 150KB.
Should I use responsive or static display ads?
Responsive display ads reach more placements and use Google AI to combine your assets into optimized combinations. Upload images at 1200×628 (1.91:1), 1200×1200 (1:1), and 900×1600 (9:16) with a 5MB limit per image. Static ads give precise visual control but serve to fewer placements.
What image sizes do responsive display ads need?
Horizontal: 1200×628px recommended (600×314 minimum). Square: 1200×1200px recommended (300×300 minimum). Vertical: 900×1600px recommended (600×1067 minimum). Upload up to 15 images total. Maximum 5MB per image.
What is the mobile equivalent of the 728×90 leaderboard?
The 320×50 mobile banner. The 728×90 leaderboard is too wide for phone screens. Always design both sizes for full desktop and mobile coverage. The 320×100 large mobile banner is a taller alternative with growing support.
Other platform guides
Sources
Guide last verified: August 28, 2026. This hub summarizes 8 formats and cites 4 sources across this page and the linked format pages.
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