Personalized Beer Pong Referee Long Sleeve T-Shirt. Beer pong referee, keep your balls in line text with a game out of control is a funny back to school design for flip cup competitors. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL