Personalized 1st Birthday Teddy Bear Long Sleeve T-Shirt. 1st Birthday Teddy Bear - A cute stuffed teddy bear is throwing a birthday party with balloons, noisemakers, confetti, and a birthday party hat. Cute gift for your little 1 year old! 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