Personalized Assistant Principal vintage Long Sleeve T-Shirt. Assistant Principal Long Sleeve T-Shirt - White has vintage style design that says premium quality grade A asst principal. 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