You can also attach to glass，mirror，any flat surface. Simply Peel and Stick on Material: PVC Color: Black Size: 21 x 11cmHow to Apply: Step 1:Clean the surface. Step 2:Stick transfer tape on decal firmly. Remove backing sheet. Step 3:Position sticker on wall or surface and rub over with a card with pressure Step 4:Remove application sheet slowly.Package Included:2 x Toilet Seat Decal (with transfer tape)