Boy's Pacific Ocean Hawaiian Cabana Shirt Set Please refer to factory size chart in Product Description below. Do Not use sizing info from Amazon. Always go for bigger size if you are not sure which size to pick. 100% Cotton; 100% Made in Hawaii by RJC Hawaii Matching shirt and shorts; Real Coconut buttons Click Alohawears storefront for more styles and matching adults apparel(choose a size first and the link will come out)