Texas Tees Sibling Shirts for Big Sisters and Little Sister, Big Sister Baseball Shirt Amazon size chart is not specific to our brand. Please see Description for dimensions on t-shirts Screen printed design on a Cotton shirt for comfort and softness. Order Includes 1 Youth or 1 Toddler shirt Heather Gray shirts are 65/35% cotton-poly blend. The graphic design is a registered copyrighted design. Infringing companies will be prosecuted.