Vertical Holder: Measures 9cm L X 6.5cm W in inner size. Suitable size for holding up to 3 credit card sized cards like proximity card, ID card, drivers license, school pass, RFID badge, clipper card, etc.Reusable PVC Case: With double layer thickness of 0.8 mm, it is considerably soft, smooth and flexible. It never creases or breaks even if folded repeatedly.Firm Zip Closure: Easy to open and close it with the excellent resealable zip. It effectively prevents water or dust to keep your cards dry, clean and long lasting.Crystal Clear: Both sides are highly transparent and present you with super clear visual effect. Easy to read or scan your cards without taking off the lanyard or case.Dual-use Design. Convenient to attach it to a lanyard or a retractable carabiner reel clip through the middle slot. And the 2 side holes is for the cord, strap, string, or thread.