Before you begin it’s always a good idea to plan your pages in advance and gather the company information, usernames, profile images and other assets you will need.
For one thing the number of characters in usernames differ from network to network, the size of profile images are different dimensions, and some pages are more forgiving in terms of editing than others. Below are some guidelines for pages as well as a list of helpful resources.
When you create your Facebook business page you will be asked to select a category upfront. You’ll want to choose it carefully since once you do you won’t be able to change it.
A category will also have an impact on the applications available to you.
Username: Facebook username 56 characters
Description: When you create the page you will need to include a description. A maximum of 200 characters may be used for your company description.
Profile Picture Size:
140 pixels x 185 pixels
Username: Twitter usernames permit up to 15 characters.
Bio: One line bio no more than 160 characters
Page Design: Twitter you can Select a page background, or upload your own.
Profile Picture Size: 48 pixels x 48 pixels
Username: YouTube usernames permit up to 20 characters
Your username can only contain letters A-Z or numbers 0-9
Once created, you cannot change your username. Even the slightest change will necessitate creating a new account.
YouTube videos are limited to ten minutes in length and a file size of 2 GB YouTube accepts video files from most digital cameras and camcorders, and cell phones in the .AVI, .MOV, .WMV, and .MPG file formats.
Profile Picture Size : 130 pixels x 100 pixels
Your name becomes part of the url on LinkedIn which can contain 5-30 alphanumeric characters e.g. http://www.linkedin.com/in/yourname
Profile Picture Size: 80 pixels x 80 pixels
Learn more about LinkedIn Company Profiles
Helpful Resources for Social Networking Presences
Mypictr is a free online tool for creating profiles, resizing to the exact dimensions for each site