I use the 5-1/2" square template to "fussy" cut my vinyl for use on 20 or 24oz tumblers.
The 6-1/2" template is for 30oz tumblers
4 bumpons are included, to be placed on the corners of the template so that it doesn't slide around while you are cutting out your vinyl.
There is a protective sheet on both sidess of the acrylic when it is shipped, peel it off and place your bumpons on the corners and you are ready to go!