Personalized Teachers Count Newborn Layette. Math Teachers Count 1-2-3-4-5-6-7-8-9 is a humorous twist on words and a funny gift design for birthdays, holidays and graduation. 100% combed ringspun cotton 5.8 ounce 1×1 baby rib sleeper. 3/8" flatlock binding at envelope neck and cuffs. Back sleeve flap to protect hands. Elastic opening at bottom. Infant: 0-3 Months