Madame Rattatouille lunch sac

Step 6 SEWING THE MAIN PART OF THE BAG.

NOW WE ARE SEWING THE FRONT, BACK, SIDES AND BOTTOM OF THE BAG.
Pin the sides to the front of the bag.  It is one of the large pieces.  Next sew the side seams bout the width of your pressure foot.  Iron seams flat.  Trim threads.  Next pin the back to the front on each side right sides together.  It should form a bag with no bottom.  Iron seams flat and trim thread.  Now pin the bottom piece to the ends ( sides) of the bag centering it,  by finding center on both pieces.  Lay one end as flat as you can,  placing under the pressure-foot.  Be sure to allow about the length of the pressure-foot before you begin to sew. 

Here is a sample picture.  NOTE: it is necessary to allow some room at the ends so when you sew the sides of the bottom you have a little give.  When you sew the sides after the ends this will sew the part that was missed. 

Sew both ends of the bag, trim threads and press seam flat. 
Next pin the bottom sides to the bag sides.  Sew the width of the pressure-foot.  NOTE: it will be necessary to ease the fabric in at the ends.  Trim threads and iron seams flat.