You can have this acrylic pattern from here:
The finished size is: 10.2" x 6.7" x 2.8" (26cm x 17cm x 7cm).
Leather: We advice 2.0mm (5oz) leather for Surface, size 40cm x 65cm. Welt leather is 0.8mm-1.0mm(2.5oz), size 80mm x 20mm x2
Hardware: No.5 zipper 35cm x1, No.5 slider x1, 18mm Magnetic button x1, 25mm D-ring x2, 25mm Dog hook x2, 25mm Roller buckle x1, 8mm x 6mm rivets x3
Tools: If you are a new leather player, try to considerate to have tool kit here: http://www.leathercraftpattern.com/leather-tools-...
Step 1: Sew Zipper on Zipper Leather
Here I add some pictures to show you how to make a zipper.
Step 2: Sew Front Pocket's 2 Pieces of Gusset, Front Pocket's Front Piece and Front Pocket's Flap With Main Front Piece.
Step 3: Now We Sew Welt and Main Gusset on Main Front Piece. the Reverse the Inner Outside.
Step 4: Punch Holes on Gusset, Make 2 Pieces of Tabs With D-rings. Sew Them On.
Step 5: Reverse the Outside In, and Sew the Back Piece On, Here Please Notice the Back Piece Is Sewn With Grain Side In, We Will Reverse the Inner Outside Later.
Step 6: Reverse the Inner Outside From the Zipper Opening.
Step 7: Now Install the Magnetic Button on Pad Leather and Sew Pad Leather on Front Pocket's Flap, the Bag Is OK.
If you don' t know how to make a strap, please look at this link: