10 pieces of arm badge holders, enough quantity to use and replace, can meet your daily use The clear card holder is 11 x 11 cm / 4.33 x 4.33 inches so you can fit 3 - 4 inch cards in it, and the adjustable waistband makes it suitable for most arm sizes Firmly fixed: Our arm badge holder is made of plastic, clear and creates greater friction with cards, and its nylon strap is strong and durable enough for long-term use and not easy to break Used for: Arm badge holder is a great way to keep your identification out of the way, it is suitable for offices, restaurants, factories and other , it can also be used in airports, subways color: Black Material: Plastic Package Contents: 10 x arm waterproof certificate cover Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.