SleepytimePjs Women's Plaid Flannel Pajama Set (Med) cotton, flannel 100% Cotton Flannel Pants, 100% Cotton Knit Top Machine Washable, Sizes run as follows: X-Small (2-4) Small (4-6) Medium (8-10) Large (12-14) X-Large (16-18) 1X (18-20) 2X (20-22) 3X (24+)