Rugged Heavy Duty Ring sizer that can reduce or enlarge rings in standard U.S. sizes ranging from 1 through 16. Feature components include a reversible base plate with an assortment of 16 smooth, high polished honed reduction dies that will accommodate bands up to 1/2" (approximately 12 mm). Marked with standard U.S. sizes ranging from 1 through 16. Dimensions: 17-1/2" x 7.25" x 4.5". Whether it's a coin-ring, solid gold or platinum band, or any other non ferrous material - this Ring Stretcher by Rosenthal Collection will be a workhorse for your workshop.