Personalized Sailing 100 Days 3rd Grade Long Sleeve T-Shirt. Funny 100th Day of School Long Sleeve T-Shirt - Pink for 3rd grade, primary school teachers with sailboat and stars. My Kids Sailed Through 100 Days of 3rd Grade. Celebrate your students being 100 days smarter. 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