Everything you need to know about ad sizes but were afraid to ask.
Desktop, Mobile, and Tablet
728x90 Also known as a "leaderboard." Tends to have more ad inventory available from advertisers, which can increase earnings when both text and image ads are enabled. This option works on both desktop and mobile.
300x250 Also known as a "medium rectangle." Tends to have more ad inventory available for advertisers. This option works on both desktop and mobile.
Mostly for Desktop
300x600 Sometimes referred to as a "half page." This format provides a larger space for advertisers to get their message across and can offer users rich engagement.
160x600 Also known as a "wide skyscraper." Tends to have more ad inventory available.
120x600 Also known as a "skyscraper," this format can fit into narrower spaces that don't accommodate the 160x600 wide skyscraper.
Mobile Only Sizes
468x60 Also known as a "banner." This format can fit into mobile ad spaces. The supply of available display ads for this ad size is generally limited though, which may lead to sub-optimal ad performance.
320x100 Mobile-driven ad format that provides twice the height of standard mobile banners.
320x50 Also known as the "mobile leaderboard." This format is a mobile-optimized banner. These ads fill the width of a smartphone screen.
All supported image sizes: 300×250, 728×90, 160×600, 300×600, 970×250, 336×280, 468×60, 234×60, 120×600, 120×240, 300×1050, 970×90, 250×250, 200×200, 180×150, 125×125, 320×50, 320×320, 320×100, 250×250, 200×200
Maximum filesize: 1 MB
All supported image types: PNG, JPEG, GIF