Can't get skinnier than this wallet
Due to the size, your credit cards don't have to overlap, so this thing is super slim even with several cards.
ProsI really like the elastic pocket for your frequently used cards, good design! Another neat feature is a pocket next to your folding money area. Perfect for door scan cards, toothpicks and other items. As the card pockets are facing into the fold, there is no way a card will fly out of the wallet if you drop it. Which has happened to me several times with my last small format wallet. Much more secure.
ConsThis is a large wallet length/width-wize. But it's so thin, this is less of a factor, for me at least. Warning, this is one horrible smelling wallet when you get it out of the shipping box. I mean a chemical nightmare kind of smell. I figure it would go away after awhile, and it did.