You can have this acrylic pattern from
The finished size is: 9.4" x 5.7" x 4.5" (24cm x 14.5cm x 11.5cm).
Leather: We advice 2.0mm (5oz) leather for surface, size 40cm x 60cm; 1mm (2.5oz) leather for welt, size 1300mm x 20mm; 3mm (7.5oz) leather for shoulder strap, 400mm x 20mm, and 900mm x 20mm.
Hardware: No. 5 zipper 36cm x1, No.5 silider x1, 20mm D-ring x2, 20mm Dog hook x2, 8mm x 6mm rivets x4, 9mm x 6mm belt screw x8, 20mm square bar buckle x1
Tools: If you are a new leather player, try to considerate to have tool kit
Step 1: Sew Zipper on Gusset Leather.
Here I add some pictures to show you how to make a zipper. Thin the edge will make the bag easier to be sewn.