Step 10 - Pin and baste fabric to the back side of your bag. My fabric is a printed denim with a definite one way pattern, so I made sure that the fabric would be facing in the opposite direction when laid flat. If you take the ends of the bag and fold it upwards, you will see the design will be running the same way. Find the middle point of your bag (from top to bottom) and mark an equal distance from each side. I wanted a 4" base, so I marked 2" from the middle on each side.