Univeral Size for Any ID Card UsesInternal card holder size 8 x 5cm / external dimensions 10.1 x 7cm, telescopic strap length 0-650 (mm). Suitable for all types of working evidence, student ID cards and vital evidence . Smooth and ElasticThe Badge holders is made of high quality nylon and durable leather. PU skin is smooth and elastic, pleasant to the touch and durable. . 10 DIfferent Colors IncludedThese card cases are available in red, orange, pink, light blue, purple, blue, green, black, yellow and fluorescent colors. 10 colors to meet different requirements. . Easy for You to Place CardSpool with metal clip on the back. They can be hung on strap loops, backpack or anywhere and you don't have to worry about them falling . For Any School Office UsesThis badge reel is perfect for keys, ID card, business card, driver's license, insurance cards, etc. .