Currently we support file types .jpg  .gif .png  and .swf in standard IAB media formats:

• 728 x 90  (Leaderboard)
• 468 x 60  (Full Banner)
• 300 x 250 (Medium Rectangle)
• 160 x 600 (Wide Skyscraper)
• 120 x 600 (Skyscraper)
• 120 x 240 (Vertical Banner)

Max file size is 300kb.

AdXpansion also supports moblie specific ad sizes in .jpg  .gif .png

• 300 x 100
• 300x50
• 305 x 99

Max file size for mobile ad units is 50kb.

Please note that all sizes are valid for mobile traffic.