The sizing is definitely off due to the material. I am 5’1, 105 pounds, and I am normally an XS (which is what I ordered). There is NO STRECH when it comes to the the skirt. I could barely walk because of how tight it is on my butt. If u weigh like 90 pounds the XS is for u, but if u are curvy u may have to go up a size or two depending on your shape. If you are twice as wide in the hip/butt area with a smaller top half then I would go up 2 sizes.

cute !