Size: 300 x 250
File Size (max): 100k
Duration: 30 seconds maximum
Formats: jpg, gif, HTML5. Important: we also need jpg file as backup in case the HTML5 won’t load on user’s device (max 39K).
Onscreen: can display expando ads over content (they expand to 600 x 250). Expando ads must be hosted by a certified third-party.