Personalized Irish St Patricks Day Green Dinosaur T-Shirt. Cute green dinosaur on a St Paddys Day holiday T-Shirt - White has shamrock clovers for celebrating St. Patrick's Day in style. 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.