[Ring Sizer Mandrel Introduction]: The ring mandrel includes 4 sizes of US 2-15, EUR 41-76, UK D-Z+5, 1-36, which can meet the measurement needs of different sizes of .[Finger Sizing Gauge Introduction]: The blue ring size gauge including US Size of 0-13 and UK Size A-Z with Half Size.("7 O" is US size 7, UK size O. "-7 P" is US size 75, UK size P etc.)[Ring Size Belt Introduction]: 2PCS ring sizer belt made of durable plastic, measures from 1-17 (US size), works like a belt that you adjust around the finger.[ Introduction]:The will make your ring smaller without resizing. Moreover, it fits both women and men rings.Colour:Black+blueMaterial:Metal + plasticPackage Contents:1 x ring sizer mandrel1 x finger sizing gauge2 x plastic ring sizer belt2 x Only the above package content, other products are not included.Note: Light 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.