You can use nearly any material you like and you can make the bag any size you like. You can vary the size of your bag by using different type of material and size of hook and/or increase/decrease the size of the basic square.
This bag is roughly 40cm (16’’) wide and 30(12’’) high.
One square is 16cm (6,5’’)x 16cm (6,5’’) and you will need 11 of them + one triangle.
The strap can be as long or short as you will make them, they are adjustable, in this case 110cm(44’’).