Personalized Happy 1st Mothers Day Outfit Girls Long Sleeve T-Shirt. Cute happy first Mother's Day Long Sleeve T-Shirt - White with pretty flowers floral border for a little girl. 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