I don't know what type of cards the slots fit but all my cards are standard credit card size and none of them fit in the slots. If I really force it, I can get the skin to stretch enough to fit in, but then it's almost impossible to pull it out again. I've never had a wallet to put my cards or ID in.
BRASS TACKS Leathercraft Handmade Blocking Men's Accessories and Wallets, Card Cases & Money Organizers
89 Review
Wally Micro Reversible Wallet Pull Tab Men's Accessories and Wallets, Card Cases & Money Organizers
53 Review
Minimalist Slim Wallet Men Women Men's Accessories for Wallets, Card Cases & Money Organizers
51 Review
π Minimalist & Durable Flowfold Sailcloth Made from Recycled Materials
58 Review