This Dinosaur Hyper Reflective Decal Set comes on a sheet that is 3-3/4" wide and 5" high. The Dino Helmet Sticker Set comes with 6 decals 2" Apatosaurus 2" Plesiosaurus 2" Triceratops 2.25" Tyrannosaurus 2.25" Pterosaur 2.50" Stegosaurus This Reflective Dino Decal Set is cut from Automotive Grade Reflective Safety Vinyl. This is the same reflective decal material used on police cars and fire trucks. You are not limited to using this Reflective Dino Transfer Set on helmets. They are good on any smooth surface! You can add safety to your, bicycle, scooter, jet ski, snowmobile, and car!