Personalized Unicorn 2nd Birthday T-Shirt. A cute unicorn with wings, a colorful mane and tail, and wearing a gold crown stands on a rainbow by a golden 2. Cute 2nd birthday gift. Everyone loves our Custom T-Shirts! 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.