Please note: I am not completely certain of material used in this artisan made piece. It is possibly silver bronze, sterling silver, or stainless steel?? It is heavy and a very shiny silver tone. It came from a studio in Oregon called Koyang Studio which is owned by a sculptor of bronze and stainless steel objects, according to its web site. This item is even more amazing in person as it is shiny and very well made. The artist signature/title/and year is etched on back. It is in excellent condition and has not been used. The nipple measures 1.75 inches wide and 2.5 inches long. Shipped with USPS Ground Advantage. Thanks for eBaying with me!