Several Avery name badges are 8 per sheet, 2-1/3x3-3/8 inches. The different numbers represent different pack sizes or printer compatibility (inkjet or laser or both), but they all share the same template. Note that the templates for name badges that have color borders are slightly different.
You can design these using the 5395 template in Avery Design & Print Online
You can also use a template built into Microsoft Word or download an Avery 5395 template for Word, Photoshop, Illustrator, InDesign or Pages.
Here's some information on recommended printer settings.
If you want more information about a specific Avery product, search for the product number on avery.com.