BEAMNOVA 2 in 1 Ring Stretcher Sizer Enlarger & Reducer Repair Adjustment Jewelry Making Tool Dimensions: 17- 1/2" x 7- 1/4" x 4- 1/4" 2 in1 heavy duty ring stretcher / reducer for quickly resizing your bands. Size Range: Rings & Bands 1-15 (US Sizes) / 6-33 (CN Sizes) Reversible Base Plate Reduction Die Ring Expander utilizes a 4 segment spline enlarging system to uniformly enlarge rings