Typically the pockets do get stacked one on top of the other, with the top one being a little shorter than the bottom pocket. Generally the lining is bit thinner than your planing on as well. I usually use 3-4 oz tooling leather for backs, and 2 oz lining for the pockets. Keep in mind, once you put cards in those pockets, no matter how thin the lining, the wallet bulks up.