Standard display banner sizes:
Mobile Banner (320 x 50)
Mobile Banner (300 x 50)
Large Mobile Banner (320 x 100)
Large Mobile Banner (300 x 100)
Leaderboard (728 x 90)
Large Leaderboard (970 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 formats are accepted: JPG, PNG, GIF.
Optimal file size for JPG and PNG: 750 KB.
Max file size for GIF: 3.5 MB.
Creative must be high resolution (The creative must be a minimum of 72 pixels per inch and is recommended to be 144 pixels per inch).