Personalized Mermaid-Greek Grandma | I Love My Yaya T-Shirt. This cute and playful design is a wonderful way for grandsons and granddaughters to show appreciation for their Greek grandma. Its vibrant colors and fun imagery make it a delightful addition to any wardrobe, ensuring that Yaya feels cherished and loved every day. 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.