Sheet Size : 430 x 255mm. Sizing: Largest butterfly 180 x 95mm (7 x 3.7"), Smallest butterfly 20 x 16mm (0.7 x 0.6"). stickers are made of adhesive fabric. This makes them perfect for children and adults alike, as they are removable and completely reusable. Simply just peel from the sheet and stick on the wall! They can be scrunched into a ball and will easily un-scrunch and re-apply to your wall, many times over. stickers are non-toxic. Can be applied to almost any surface, and will not damage your walls.