I'M THE BIG BROTHER on 100% Cotton Infant & Toddler T-Shirt by South Horizon (in 21 colors) This shirt runs small. Please order next size up. See sizing under Product Description below. Genuine South Horizon product. Sold exclusively by South Horizon 100% cotton jersey. Heather is 90% cotton, 10% polyester. Available in Infant and Toddler sizes. See sizes under PRODUCT DESCRIPTION below.