Here is the bicolour slim credit cards holder by Lucrin. This cards case in authentic leather is delivered with a removable plastic pocket that can accommodate 6 x 2 additional cards. The leather cards case itself consists of 2 pockets for debit/credit cards and 2 really practical flat multi-function pockets.
Dimensions, closed: 10.5 x 7.5 cm
Dimensions, open: 10.5 x 15 cm