Personalized 4th Anniversary Celebrate T-Shirt. 4th Anniversary T-Shirt - Azalea with words “Celebrating Our 4th Anniversary” for a 4th Anniversary Celebration. Add a name or customize for a personalized anniversary gift. Everyone loves our Custom T-Shirts! 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.