Grow · Ads
IAB units. Publisher-ready HTML5.
Live HTML5 at IAB sizes - the units as they ship to publishers.
300 × 250 px
Medium Rectangle 300×250. In-article or sidebar. Live HTML5 at native size. Desktop · Mobile
Production
HTML5 to IAB size and LEAN guidance: file weight, no auto-expand, AdChoices.
Idea + unit
Copy and motion inside the slot - not a static JPG if the flight allows HTML5.
Not this
Proprietary network formats (takeover, in-image, and the like) stay off this page for now.