Vertical 6 Slot Bi-Fold
Modern take on the classic bi-fold. Handstitched full grain veg tan leather. Enough room for 6-10 cards depending how you thick you like it. Also room for some cash.  
 
Closed Dimensions:
4.5 x 3
 
Flap Bi-Fold
Another take on the classic bi-fold. Room for 2-5 cards and a flap to stash some cash. 
 
Closed Dimensions:
4.25 x 3
 
Both are made with 4/5 oz full grain veg tan leather.