Personalized Butterfly Big Sister Long Sleeve T-Shirt. BIG SISTER Long Sleeve T-Shirt - White with smiling pink and blue butterfly with polka dotted wings surrounded by pink flowers. 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