Personalized 55th Birthday for Women 55 Year Old T-Shirt. celebrate turning fifty five with this unique 55th birthday butterfly and slogan 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.