Personalized Kawaii Narwhal Granny's Sweetheart T-Shirt. This Kawaii Whale Granny's Sweetheart design is perfect for any Whale lover in your life! With a cute and kawaii Whale design, this is sure to be a hit with any grandmother or grandchild. Gift for grandchildren, Kawaii Whale Granny's Sweetheart design. 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.