The anti-theft brush RFID card holder is made of coated paper, aluminum foil and plastic, waterproof and tear resistant, protects the magnetic card from moisture damage, shields NFC reading, and protects your property and personal information. It is suitable for all kinds of IC cards, crescent seam design, Large opening, easy to put in and take out, beautiful and generous. 2 1/4" W x 3 7/16" H