Magnet sheets. Adhesive can be applied to the back to stick them to the wall. The surface has a slightly gray appearance; it is not white. There are 6 sheets approximately 29cm x 115cm. There are 4 sheets approximately 26cm x 115cm. They are for sale from 600 yen per sheet, so please comment with how many you need. These are leftovers from a job. Thank you for your understanding.