Personalized I'm One Giraffe T-Shirt. I'm one! A cute little giraffe winks as it sticks its head through the O in one. Adorable 1st birthday gift for your little one year old. 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.