If you are going to hang it, then decided on the width of the rod. I would consider 3" to be fine so cut your 7" wide (using a 1/2" seam allowance) and cut it just a 1/2" less on both sides. Then I do a double turn over and stitch the sides, press in half and attach it onto the top before doing the binding. I sew the binding to the back so when I attach the binding. the sleeve is secure and the raw edge will be hidden in the binding.