If you are sewing a belt or a handle for a purse or other bag, you may want to attach a buckle to make the strap adjustable. Sewing a buckle, whether is it is a traditional belt buckle or a pair of D rings is relatively simple. If you are using rings, you will only have to wrap the fabric around them and sew it in place. If you are using a buckle with a prong in the centre, you will have to allow a hole for the prong.
Cut two 1 1/2 inch wide strips of fabric to the length you'd like, plus 2 inches.
Set the two strips on top of each other, right sides facing in. Sew along the two long sides and one short side with a 1/4 inch seam.
Turn the fabric strip right side out.
Slide the buckle or D rings through the short side of the strip with the raw edges. Place the buckle or rings 1 1/2 inches from the edge of the strip.
Mark where the prong on the buckle is on the fabric if you are using it. Slide the buckle off the fabric and use an awl to poke a hole in the fabric at the marked spot. Slide the prong through the hole from the wrong side of the strip of fabric.
Fold the 1 1/2 inch of fabric on the end under the buckle or rings. Pin in place, the stitch in place on the two sides and along the short side. Also sew a row of stitches just underneath the buckle or rings to hold them in place.
Poke a series of holes in the other end of the strip if you used the buckle, spacing the holes evenly so that the prong will go through them.
Wear the belt or attach it to a garment or handbag.