"Please use our size chart to determine which size will fit you best, if your measurements fall between two sizes we recommend ordering a larger size as most people prefer their sleepwear a little looser. Small: Measures US Size 4-6, Chests/Bust 35-38\" Medium: Measures US Size 8-10, Chests/Bust 37-40\" Large: Measures US Size 12-14, Chests/Bust 38-42\" X-Large: Measures US Size 14-16, Chests/Bust 42-44\" XX-Large: Measures US Size 16-18, Chests/Bust 44-46\" 3X-Large: Measures US Size 22, Chests Ladies Pajamas, Plus Size Pajamas, Comfortable Pajamas, Cozy Pajamas, Women's Sleepwear, Flannel Women, Womens Pyjama Sets, Sleep Set, Night Shirt