Personalized Donut Lose Your Sprinkles But I'm Going to be a Big Sister T-Shirt. Celebrate the sweet moments of growing your family with this adorable design that captures the joy of sibling love. Grab one today and let the world know that sprinkles and siblings are on the way! 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.