I love the fit and fabric of my swift skort. I originally purchased an XS, which would have been fine in the waist, but I ride a lot so I have a bigger bum that the XS was not quite enough to cover. So if you're a little larger in the bum, you might size-up. I'm very happy with the S, though - and SUPER happy with the customer service/experience of returning and purchasing a new one. I've run in the skort twice and there was no riding up, binding or bunching. The waistband is comfortable, and the fabric is soft and breaths well. The only thing I wish is that the color of the skirt was black. When wet/sweaty, the purple-ish gray merino turns black. And b/c it's a skirt, the sweat stains hit in a not-so-flattering way. Not a deal-breaker, but it would be considerably more flattering for active sports in solid black. That said, just wearing it around town, it's very cute and comfy, and I like the small pocket for my key.