Stickers can be print and cut in various sizes: circles, squares, rectangles, or custom cut to your need. 

Stickers (n):

An adhesive label or notice, generally full color printed or illustrated. Can be used outdoors and hold up to elements over an extended period of time. These are printed on a vinyl or polyester material with durable outdoor inks.

Other Terms: Stickers, Bumper stickers, diecut stickers