Take the loop and side it under the layers of the unsewn side. Use the center seam for guidance. Sew 1/4" seam down the unsewn side. Back stitch over the loop.
Next sew 1/4" seam down both sides.
Measure and sew about 3 1/4" from each side of the wallet to make the pouches. I put tea bags in them first ot make sure they will fit.