I bought this based on my measurements and the chart that came with it, but it should have fit at least one size smaller. From the buckle to the end, the large size is 46 inches but is advertised for waists of 37-41 inches. Because it's an elastic band, it's VERY big with a big lip. I'm curious as to the length of the medium or small sizes - wish the product info listed the slack measurements of the strap. Aside from the size, the material seems to be well made. sharp threads (like fishing line) on the inside edge of the ends of my belt in a stitch - I don't want to wear delicate material, but I think jeans should be fine.