ToolUSA 29 Piece Ring Sizer (size 1-15 In Half Size Increments) And A Jeweler's Chrome Ring Mandrel: KIT-TJ97A55 Ideal for jewelry makers -also useful at home to size, repair, reshape and measure your rings 29 Pieces nickel plated brass ring sizer on a hoop - sizes 1 to 15 in half size increments 12 inches long ring mandrel in hard chrome finish - sizes 1 to 15 in quarter size increments US standard sizes - finely crafted for an extraordinary accuracy High quality sizers for a durability and long lasting use