Having a broad set of creative sizes allows your ads to be served across a wide selection of inventory. Supported display creative sizes are:
Mobile Banner (320 x 50)
Leaderboard (728 x 90)
Wide Skyscraper (160 x 600)
Medium Rectangle (300 x 250)
Half-Page Skyscraper (300 x 600)
Billboard (970 x 250)
Mobile Full-Page Interstitial - Portrait (320 x 480)
Mobile Full-Page Interstitial - Landscape (480 x 320)
Tablet Full-Page Interstitial - Portrait (768 x 1024)
Tablet Full-Page Interstitial - Landscape (1024 x 768)
The following file types are accepted: JPG, PNG, GIF.
Recommended file size for JPG and PNG: 750 KB.
Maximum GIF file size: 3.5 MB.