Personalized Kawaii Octopus Uncle's Sweetheart T-Shirt. Kawaii Octopus Uncle's Sweetheart is the perfect design for your little one! With its cute octopus design and "Uncle's girl" text, it's perfect for baby showers, new babies, or just to show your little one how much you love them! 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.