The 320x50 at a glance
| 320 x 50 | |
|---|---|
| Size | 320 x 50 px (about 6:1) |
| Google's name | Mobile banner (300 x 50 is a separate mobile banner size) |
| Where it shows | Top or bottom of mobile apps and mobile sites |
| File limit | 150 KB for uploaded image ads in Google Ads |
What fits in 50 pixels
- Your logo or name. Recognition is most of what a strip this small can do.
- Three to five words: a benefit or an offer, not both.
- A tiny product image only if the product reads as a shape at this size, like a can, a bottle or a shoe.
- A button or arrow on the right.
- No prices with conditions, no review quotes, no fine print.
Accidental taps are a common complaint with small sticky banners, so judge them by add-to-carts and sales, not clicks alone.
What StoreToAds makes instead
We do not make fixed mobile banners or HTML5 banners yet. Each ad includes the images Google's responsive display ads use: a 1200 x 628 landscape, a 1080 x 1080 square and a 1080 x 1920 vertical. Google's list of common mobile sizes includes small strips like 300 x 50, and responsive ads adjust to fit them. At that size there is little room for an image, so your headline and logo do the work.
On phones, the bigger chance is usually full screen. The same ads come in 9:16 for Instagram and Facebook Stories and Reels, and in 4:5 for feeds, where your real product photo has room to sell.
