Leather Short Wallet
You can have this acrylic pattern from here:
http://www.leathercraftpattern.com/Acrylic-template/acrylic-short-wallet-pattern-A-104
The finished size is: 5.2" x 3.7" x 1" (13.2cm x 9.5cm x 2.5cm).
Advice:
Leather: 2.0mm (5oz) leather, size 22cm x 14cm. 1.0mm (2.5oz) leather, size 30cm x 39cm.
Hardware: 10cm No.3 zipper x1, No.3 slider x1.
Tools: If you are a new leather player, try to considerate to have tool kit here: http://www.leathercraftpattern.com/leather-tools-leathercraft-tools/leather-tool-kit/leathercraft-tools-leather-craft-patterns-leather-art-leather-carving-tool