Mobile Expansion Banner
320x50/320x480/480x320
Specs

Size: 320x50 - Expands to 320x480 or 480x320 (depending on orientation).

Ad Type: Static or Animated GIF

Guidelines

A banner for mobile web which expands to full screen either by clicking on the banner or showing the ad on page load. It is both Apple and Android compatible.

Example may be viewed here. (Best viewed from mobile device)