I have pretty muscular calves so finding tall boots and half chaps that fit can be a challenge. The stretchy ribbing around the back of these is great because they stretch around the muscled part of my leg and don't bag as it gets down to my bony ankle. I ordered a large, but probably could have got a medium. The height measurement instructions are a little vague -- what counts as the "bottom of the chap" anyway? -- and I miscalculated a little. The picture on the bag the chaps come in show that one should measure from the back of the knee to the ankle bone, which would have been good to know when I was choosing a size. I just sewed up the elastic on the stirrup of the chaps & they fit fine now!They seem to be holding up well so far, and I like that they're washable. They do leave dye marks, so I would recommend giving them a wash before you wear them with breeches you don't want stained. The dark brown looks nice with my chocolate Ariat paddock boots.