Ateco's Number Cookie Cutter Set includes 10 pieces. Each number is made of stainless steel and measures approximately 3-inches. By Ateco. Since 1905, Ateco has supplied fine restaurants and bakeries with quality built, specialty baking tools. Ateco products are internationally renowned for their high quality. When you use Ateco products, you’re not only enjoying quality craftsmanship, you’re also enjoying quality design; the products are a result of over one hundred years and four generations of innovation and development.