Mobile Leaderboard Ad

320 x 50 px sRGB 6.40:1 landscape

A 320 by 50 px Mobile Leaderboard. The standard banner format for mobile web and in-app placements, sized to fit the bottom of typical phone screens.

about the height of a sidebar block

About this size

Mobile Leaderboard is the dominant mobile ad format. Most mobile web publishers and in-app SDKs default to this size for the bottom-of-screen banner slot, and the 320 by 50 dimensions are sized to fit the narrowest standard mobile viewport (320 px on classic iPhone widths) without horizontal scroll.

The 50 px height is the entire constraint. There is room for a small brand mark, a short headline, and a CTA button, but the layout has no margin for anything more.

Mobile ads
App banners
Compact promos

Pro tips

1 One image, one short headline, one CTA. 50 px tall does not hold more.
2 Test on a real phone screen. Type that looks fine in the editor often fails to render legibly on a 5-inch display.
3 Sized to the narrowest standard mobile viewport. The format renders without horizontal scroll on any current phone width.