Personalized I'm Going to be a the Big Sister T-Shirt. The elephant theme adds a touch of whimsy and charm to each item, making them perfect for any little peanut in your life. Let your older sister shine with our big sis sister badge or surprise a new cousin with a thoughtful gift idea. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.