I’ve been trying to gather together some comprehensive information about the specs for profile customizations on various social media platforms. I’ve got a bunch, but there are some question marks as well. If you have any information to help flesh this out, contribute it and let’s build out a really useful resource…
UPDATE - NEW DESIGN…
Profile image: Square, displays at 125x125 (but apparently it should measure at least 180x180?)
Cover photo: 851x315 (must be at least 399 wide)
App custom image: 111x74
Specs on every other piece of the timeline design: http://www.dreamgrow.com/facebook-cheat-sheet-sizes-and-dimensions/
Main image: 180w x up to 540h
Thumbnail: A square piece of your profile image, as shown below, shrunk to 50x50. Can also scale your full profile image to fit in the box.
Main image and thumbnail: square image, max 700k
Background image: Needs to fade to a replicable color on the right edge and bottom, Difficult to predict how much space you will get on either side of the Twitter content – depends on screen resolution and browser size.
Can also decide color of links
Avatar: Avatars can be up to 1600x1600 pixels, displays at 36x36 pixels
Background: content = 970px wide in the center, Endless scrolling, so you should have something that fades out
Banner (Partner channel only): needs to be included as part of the background. Can push your content down by up to 150px to display the banner section of the background. Insert an image map to create links.
Watch page logo (Partner channel only): 25px h by anything up to about 200px wide
Channel guide for the old design: http://www.youtube.com/pdf/YouTube_Brand_Channel_Redesign.pdf
Main image and thumbnail: square image