Mobile Banner Ad

300 x 50 px sRGB 6.00:1 landscape

A 300 by 50 px Mobile Banner. A slightly narrower variant of Mobile Leaderboard, used for in-feed mobile placements and retargeting campaigns.

about the height of a sidebar block

About this size

Mobile Banner is the 300 px wide cousin of Mobile Leaderboard. The 20 px width difference matters more than it looks: the format fits in slightly narrower in-feed slots and aligns with the 300 px wide Medium Rectangle for ad sets that need to share asset width across desktop and mobile.

The use case is mostly retargeting and reminder ads where the brand mark and CTA do the work and elaborate creative is unnecessary.

Mobile ads
Compact banners
App promos

Pro tips

1 Smaller than Mobile Leaderboard but still widely supported. The 20 px width difference fits in narrower in-feed mobile slots.
2 Use for retargeting and reminder ads where the brand mark and CTA carry the message. Subtle creative does not survive at this size.
3 Aligns at 300 px wide with Medium Rectangle, which makes asset sharing across formats simpler.