Understanding Logo File Formats -- Great info explained in an easy to understand logical way! Know which file is used for what and what you should use & get from your Designer! :) Great for referencing and learning....
Social Media Image Size Guide
Social Media Image Size Guide for 2016! #socialmedia
pkam: Bedrich Grunzweig - TWA Airport Lounge Geometric Floor
by Deanne Cheuk (via pink box http://www.pink-box.com/2009/09/artist-deanne-cheuk/)