The stick size of your glue gun will determine the size and type of glue stick you will be able to use. 1/2" glue guns are the most common giving you the most glue stick options while 5/8" and 1 3/4" glue guns typically allow for higher output. Bulk guns allow you to use the lower cost bulk hot melt but tend dispense more slowly. Contact us with questions about glue gun stick size.