Personalized Keep Calm Graduation Grandpa Long Sleeve T-Shirt. Funny Long Sleeve T-Shirt - Vintage Black with graduation cap for proud grandpas and papas of graduating high school, college, PHD, med school, law school, nursing school graduates says I CAN'T KEEP CALM I'M THE PROUD GRANDPA OF A GRADUATE. Perfect for family photos. 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