cotton linen S=(US 38), M=(US 40), L=(US 43), XL=(US 46), 2XL=(US 48), 3XL=(US 52). Button closure Machine wash or hand wash, no shrinkage after washing. High Quality Material:This mens casual button up hawaiian shirt was made of high quality material, Cotton and linen fabric is very soft, breathable and not easy to wrinkle. Very suitable for summer wear, It is light and feels soft. Cuban collar&Hawaiian Style: It's Cuban cut features a classic fold to the sleeve ends, stitched to maintain look, along with the hidden top button.There is also a pocket on the right side of the shirt for a casual look,It is also very convenient for keeping small items with you. Match: Men's cotton linen button up hawaiian shirt is suitable as a casual shirt, Hawaiian shirt, work shirt,dress shirt. It can be paired with denim shorts or and slacks, perfect for beach vacations. Occasion: Perfect for spring, autumn and summer. This tropical style button down guayabera shirt is great for many occasions,it's can be a gift for your husband. Not only can be worn on summer holidays, theme parties, sunny beach, wedding, fishing and etc, but also can be worn for work or daily life. Size and Service: Please Refer to the JMIERR Size Chart before Ordering,Not Amazon Size Chart.