Plastic Ring Sizer Finger Jewelers 36 Pieces Jewelry Gauge 36 Piece Plastic Ring Sizer; This is a new plastic ring sizer Offering USA sizes, as well as international sizes, this tool can be used by all jewelers working with rings; USA sizes include: 1-16 International sizes include: 1-36, 41-76, & 1-15.5; Find accurate ring sizes quickly and easily Each size is clearly marked on each ring; All pieces are organized by size on a metal loop, keeping them all together and in order