Fits US Size YOUTH Standard.  S=US size 6; M=US size 8; L=US size 10; XL=US size 12; XXL=US size 14
These are NOT Womens sizes, they are Youth Sizes. I have submitted correction request to Amazon. The top is nice, though I bought from another retailer, is great quality, just beware the seller is not aware of American sizing standards. Read the sizing VERY carefully BEFORE you buy. If you are larger than a size 14, they simply will not fit at all, and even at a size 14, if you are tall, they will run a tiny bit short.