320×100 Ad Size: Large Mobile Banner
The 320×100 large mobile banner is twice as tall as the 320×50. It is more visible and often earns more, while still fitting neatly on any phone.
Specs
| Spec | Value |
|---|---|
| Name | Large Mobile Banner |
| Dimensions | 320 × 100 pixels |
| Aspect ratio | 16:5 |
| Devices | Mobile |
| High-resolution version | 640 × 200 pixels (2×), scaled down |
| Typical file size | Keep images under 150 KB. Google Ads limits uploaded image ads to 150 KB. |
| Formats | JPG, PNG, GIF or HTML5 |
Where to place a 320×100 ad
- Top of the page on mobile
- Between paragraphs on mobile
Pros and cons
| Pros | Cons |
|---|---|
| ✓ More visible than 320×50 ✓ Can accept 320×50 ads in the same slot | ✗ Takes more screen space ✗ Too tall for some sticky anchor rules |
Tips for 320×100 ads
- Use a multi-size slot with 320×50 and 300×50.
- Reserve the slot’s height in your layout so the page doesn’t jump when the ad loads. See Core Web Vitals and ads.
Make a 320×100 banner for free →
Related ad sizes
- 320×50 Mobile Leaderboard
- 300×250 Medium Rectangle
- 300×50 Mobile Banner
- All banner ad sizes with live previews
Frequently asked questions
Is 320×100 better than 320×50?
It is usually more visible and earns more per impression, but it uses more space.
Where should I use 320×100?
Near the top of mobile pages or inside content.
Want to know what this slot could earn? Try the ad revenue calculator, or look up terms in the ad tech glossary.