Personalized 20th Anniversary Butterfly T-Shirt. Cute pink 20th Anniversary butterfly design comes on a special occasion keepsake T-Shirt - White anniversaries gift for the couple celebrating 20 years together. 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.