This is a basic sewing video. Hems are one way to finish the edge of a fabric–including curtains, valances, shades, or garments. There are many types of edges that can make up the hem: raw edges, turned edges, serged edges, binding edges, and seam binding edges. The hem line is the bottom line seen from the outside of the window treatment, drapery panel, or garment. Mark your hemlines on the right side of the fabric, so that you can see the line when you press in the hem line. Hem allowances can be from a few threads deep to 12 or more inches deep. Drapery panel hems are usually 4″ double folded–meaning that the hem line is pressed in 8″ away from the fabric edge, then the fabric is folded over twice, until the fabric hem is 4″ deep. A blind stitch, slip stitch, or catch stitch can be used to hand stitch a hem. Machine blind stitching can also be used to sew a hem.