1. It is a tool for adjusting ring size, The is safe and easy to wear. 2. Please measure the width of,your ring before purchasing Actual,measurement width of the ring.Actual measurement,width of the ring. 3. Ring Adjuster sizing Options,1-1.5mm XXS, 1.5-2.5mm XS, 2.5-3.5mm S, 3.5-4.5mm M, 4-5mm L,5-7mm XL, 7-8mm XXL, 8-10mm XXXL 8 Different Sizes. 4. Reduce ring 0.5-1 size, perfect for ring width from 1-10mm. 5. Don't Take It Off, Wear It Forever,When your ring fits perfectly, you never have to worry about losing it again in everyday life. Category:Regulator Colour:As Shown Material:TPU+PE Package Contents: 1set * ring size adjustment tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.