What is the difference between the Flap Boy, Flap Boy Slim and Flap Boy XL?

The Flap Boy has a large coin compartment. Therefore it is thicker than the Flap Boy Slim and has 3 credit card slots less. The Flap Boy Slim has no coin compartment. Otherwise, both models are identical. The Flap Boy XL has the same large coin compartment as the Flap Boy but offers an additional card compartment with a pull tab for 6 cards. In addition, the card slots of the Flap Boy XL are all inside the wallet and not visible from the outside.