Details & Sizing This jersey T-shirt is washed for added softness, making it a comfortable essential he'll want to wear again and again. Cotton. Machine washable. Size medium has a 24" body length and a 281⁄2" sleeve length. Sleeve length is taken from the center back of the neck. Signature embroidered pony at the left chest. Crewneck. Long sleeves with ribbed cuffs. Imported. Style Number: 444680