Everyone loves stickers, not just 8 year olds! This sticker is 4.5"x 3" - the size you see on everyone's cars that have letters that say where you went on vacation. You know? My mom said to make sure to put down they are weatherproof vinyl and have strong adhesive. I put stickers on my wall once and it took off the paint and my mom got "disappointed in me." So don't put these on your bedroom wall - put them on something like a folder or bike or your sister's guitar case! They're really cute and cool!