This is a great value item only available on the official website. You can remove the round metal fitting and attach your favorite carabiner. A carabiner is also included. You can also replace the strap with a mini pouch. Used 5-6 times, there is some wear and tear, but no scratches or stains. About 2 cards can fit in the back, but maybe 3 if they are thin cards. Please check the photos. Discounts are only available for multiple purchases. Retail price: ¥9680 ear PAPILLONNER A chain is included inside, so you can put keys etc. - The strap length can be easily adjusted. Can be used by men as well. Size: Pouch: 11.3 x 7.5 Shoulder strap length: 70-136