Robust design: ten arm badge holders are included, which is a good amount for you to use and switch out on a regular basis. General size: The clear card holder measures 11 x 11 cm/4.33 x 4.33 inches, so you can fit a card measuring between three and four inches into it. The adjustable belt allows the armband ID card badge holder to fit most arm sizes. firmly holding the card: Our arm badge holder is composed of soft PVC, which is transparent and creates a lot of friction with the card. The card is visible and will stay in place, and the nylon strap is sturdy and long-lasting enough for frequent use.