I'm working with fat quarters so the back uses one quarter with the front pieced to match the size.
You put right sides together, stitch the sides and bottom together, leaving the top open. Then turn and press the top down 1/4", then turn down another 1". With the bag wrong side out, edge stitch the bottom edge for the drawstring pocket/casing.
Then turn the bag right side out and edge stitch the very top of the bag. Make a couple of bar tacks at the top edge and bottom edge of the casing, then use a seam ripper to take out the stitches between the bar tacks. This gives you a little hole for the drawstring.
You could use ribbon, but I made a spaghetti style string for mine. The main panel on the front is the embroidery sampler from Bari J.'s new project, We love french knots.
I love the look of all the knots clustered together.
Well, all this talk of dirty laundry has reminded me I have my share waiting for me down by the washing machine...