IAB Display & Mobile Advertising Creative Format Guidelines

TL;DR — The 2015 IAB creative specs, updated for HTML5 — the standards the whole ad ecosystem is cut to.

IAB creative format guidelines, 2015, revised for HTML5.

These specifications are why banner ads are the sizes they are. A handful of dimensions in an industry standards document became the physical grammar of the commercial web — 300×250, 728×90 — and shaped page layouts everywhere.

Dull on its face, quietly consequential, and a clean example of a standard doing more design work than any designer.

Where this came from

• Brendan Sheehan’s public are.na channel

9 pages. A copy is archived locally against link rot; the header links the original source.