Calvin Klein Pyjama Shirt Size & Fit True to size - order your usual size Regular fit Model is 5'9" and a standard UK size 8 (wearing size S) Available in sizes: XS (UK 6), S (UK 8), M (UK 10), L (UK 12), XL (UK 14) Details Pure Cotton Button Down Sleep Shirt by Calvin Klein White Made from a breathable cotton blend for a comfortable sleep Pointed collar Button down front Long sleeves Matching pant available separately [search V33RE] Material & Care Material Content: COTTON (78%), RECYCLED COTTON (20%), ELASTANE (2%)