These star stickers are so cute! You can put them anywhere like a computer or a water bottle. They have a super sticky backing too. They are made by the owner of the business, Ava. She designs and makes them. Happy shopping! Below are materials, sizes, and other details. 
Materials: 
Adhesive vinyl
 
Size: 1.4 by 1.4
 
Details: 
SUPER STICKY
Unremovable - Once the sticker is put onto something, it will not come off
Waterproof!