Personalized Kawaii Octopus Ouma's Sweetheart T-Shirt. Check out our selection of cute kawaii octopus with "Ouma's Sweetheart" design apparel and gifts! The perfect way to show your grandma some love, our selection of products are sure to make her smile. Best of all, our products can be personalized with your grandma's name, making it a truly one-of-a-kind gift. 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.