Vertical Stand: Measures 9L x 6.5W (cm) inside size. Proper size to hold up to 3 credit card sized cards like proximity card, ID card, driver's license, school pass, RFID badge, clipper card, etc. . Reusable Card Sleeve: With 0.8mm double layer thickness, it is considerably soft, smooth and flexible. It won't wrinkle or break even if it's bent repeatedly. Firm Zipper: Easy to open and close with the excellent resealable zipper. It effectively prevents water or dust to keep your cards dry, clean and durable. Crystal Clear: Both sides are highly transparent and provide you with super clear visual effect. Easy to read or scan your cards without removing the lanyard or case. Dual purpose design. Convenient to attach to a lanyard or reel clip retractable carabiner through the middle slot. And the 2 side holes are for cord, strap, string or wire.