With color of your choice and an H hook, ch 35 (I used Peaches & Cream in a green and white verrigated).
Row 1: Sc in second ch from hook and across; ch 2 turn
Row 2: HDC in each st across; ch 1 turn
Row 3: Sc in each st across; ch 2 turn
Row 4-25: Repeat rows 2 and 3
Fold "wallet" in half and single crochet the left and right sides together. Turn wallet inside out and tada!
Embellish as you wish :)