The carpet marker is made of polyester material, which can be used repeatedly. It will firmly attach to glued down on most carpeting without using adhesives, removing the spot sitting marker won't damage the carpet. Features -Material: Polyester -Size: 10.00X10.00X0.30cm/3.93X3.93X0.12inch(round) 13.00X10.00X0.30cm/5.11X3.93X0.12inch(cat claw) -Carpet spots adhere firmly to carpet and could be vacuumed over without detaching from the carpet. -These vibrant colors help to remind kids to stand or the exact place to keep the classroom organized. -These carpet spots will add more fun for gaming, good for teaching and making the classroom atmosphere active. -Carpet spots can be used in school, big hall for amusement home schooling, to sit , teacher tools. -These carpet stickers are perfect for kindergarten, preschool and home school using and safe for kids. Package list: 36 x carpet spots