Google Display Medium Rectangle Ad Size: 300×250 px
Aspect ratio 6:5 · 300×250 pixels · JPG, PNG, GIF, HTML5
300×250 is the workhorse of the Google Display Network — the single highest-inventory ad size online.
Why this size matters
If you ship one fixed banner size, ship this one. It covers ~50% of GDN inventory alone.
- Formats
- JPG, PNG, GIF, HTML5
- Max file size
- 0.15 MB
- Best for
- Google's highest-inventory display size.
Design tips that actually move the needle
- 01Under 150 KB — Google auto-rejects over that.
- 02Text at least 20% of the frame — under-text banners underperform.
- 03Product hero + logo + CTA — all three, always.
- 04Animate under 30 seconds total if using GIF/HTML5.
People also ask
Is 300×250 mobile or desktop?+
Both — it renders inline on both mobile and desktop web. Highest-versatility fixed size.
What is 6:5 in pixels?+
For Google Display Medium Rectangle, a 6:5 aspect ratio is 300×250 pixels. Any resolution with the same ratio works, but 300×250 px is the recommended native size and avoids upscaling.
Is 300×250 the right size for Google Display Medium Rectangle?+
Yes — 300×250 px (6:5) is the recommended Google Display Medium Rectangle ad size. Accepted formats: JPG, PNG, GIF, HTML5. Maximum file size: 0.15 MB.
Related sizes
Free tools for this size
Aspect ratio reference
→ 6:5 aspect ratio: pixel sizes, mm and placementsFull platform reference
→ All Google Display ad specsStop resizing by hand. Xeli does it for you.
Xeli composes every asset to the correct native aspect and safe zone per placement — automatically, across every platform.
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