Texas Tees Superhero Shirts, Comic Book Birthday Shirt, Kids Shirt for First Birthday 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. Gift Set Includes 1 T-shirt. Heather Gray shirts are 65/35% cotton-poly blend. The graphic design is a registered copyrighted design. Infringing companies will be prosecuted.