Small Duffel 9" X 18" X 9"

This is a pattern I have used to make many different duffel bags. The main body is made of a single piece of fabric.

Calculations for the main body fabric:

Width of fabric = Length + Height + (Seam allowance * 2) Width of fabric = 18" + 9" + 1.5 = 28.5

Length of fabric = (Height + Width) * 2 + (Seam allowance for zipper * 2) Length of fabric = (9 + 9) *2 + (3/8" * 2) = 36-3/4"
Lay fabric right side up and sew zipper along the edge right side down. Sew close to the edge. Lay fabric right side up and sew zipper along the edge right side down
Lay fabric right side up and fold so the zipper is right side up. Leaving approximately 1/8" clearance from the zipper teeth, sew the fold down. It isn't necessary, but you can turn the fabric over wrong side up and stitch down the other edge of the zipper. Lay fabric right side up and fold so the zipper is right side up

Cut 109" of 1" webbing for the handle. Overlap the ends 1" and sew together to form a loop. Fold the loop at the center of the overlap and mark it. Mark the opposite end the same way.

 

 Cut 109" of 1" webbing for the handle. Overlap the ends 1" and sew together to form a loop.
Mark the center line of the fabric both directions as shown. Mark the location of the handles as shown. Mark the center line of the fabric both directions
Sew each side starting at the center of the handle. Sew 14" from the center line each direction. Sew each side starting at the center of the handle.
Attach two zipper sliders from each end. Attach two zipper sliders from each end.
Sew loops of webbing as shown. I haven' found a satisfactory way to remove the teeth from the larger zippers so I carefully sew right throught them. It is much easier if you are using coil zippers to do this but it can be done with standard zippers as well. You must turn the fly wheel by hand and go very slowly. If the needle meets resistance just raise the needle a little and move the fabric a little until the needle goes through. Sew loops of webbing on each end
Open the zippers up a little and turn the bag inside out. Sew the ends closed as shown. Leave a 3/4" seam allowance. Open the zippers up a little and turn the bag inside out.
I find it is easier to fold both sides of the fabric together to finish the seam. I find it is easier to fold both sides of the fabric together to finish the seam.
Leave the ends of the zipper exposed. Leave the ends of the zipper exposed.
Mark the edge of the fabric at the fold. Mark the edge of the fabric at the fold.
Pin the fabric so that the seam and mark line up. Draw a line at 9" (the height of the bag) along the hypotenuse of the right triangle that is formed. Make sure the line is perpenducular to the seam. Sew along the line. Draw a line at 9" along the hypotenuse and sew
Trim, fold the seam under and sew to finish. Trim, fold the seam under and sew to finish.
The finished bag. The finished bag.