728 x 90
300 x 250
320 x 50
Display ads must be a maximum size of 150KB and must be submitted as a .jpg, .png or .gif format
Animations must have a frame rate less than 5fps, and cannot run or loop longer than 30 seconds
Option A – Client Provided HTML:
HTML (complete with hosted images, “in line style,” live URL links and all necessary closing tags are required). HTML size must be under 102K to avoid clipping in Gmail.