Too small - bought an XL since reading reviews made it sound like it would fit. Wear size 12/14 in women's jeans for reference.
I gave it 3 stars though because the construction of the skirt itself (fabric, zipper, stitching) is all really nicely done. The fabric has a bit of thickness to it, so I wouldn't recommend any skin tight shirts directly over it since it would look sloppy.

Guess this gives me more motivation to keep working out so I fit into it. lol