how to make a small backpackPlace the long straps on top of "Part B." Make sure that the right side of the fabric is facing you, then place the shoulder straps on top. They need to be about 1 to 2 inches (2.54 to cc centimeters) away from the side edges. Make sure that the top edges of the straps are aligned with the straight, top edge of Part B, and that you are pinning the straps to the right side of the fabric.[18] 8 Pin Part A face down on top of the shoulder straps and Part B. Make sure that the bottom, straight edge of Part A is aligned with the top, straight edge of Part B. The wrong side of Part A should be facing you.