These were made with a few purposes in mind. 

#1- All those pesky library, department store, Costco or gift cards that you don't use often. They clog up your wallet. Put them in here and grab it when you need to find one of your "non monetary" cards. 

#2- Put your business cards here. While out, Keep it on your keyring for quick and easy access. 

#3- This does fit SD and CF cards for camera equipment. 

#4- Don't want to carry a lot? Put you money and small items in here and go without a purse. Perfect for a night out dancing. 

Water resistant exterior material with heavy duty zipper and keyring. 

8 accordion style, wide slots to put your items in. 

4.75" High, 3" Wide, 1" Deep