Personalized Santa Hat Cello Long Sleeve T-Shirt. A cello wearing a Santa hat is a funny musical instrument gift tee for string musicians, teachers and students at birthdays, Christmas and the winter holidays. 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