Ring Sizer Mandrel is made of plastic material, which is lightweight and easy to handlePlastic ring sizing stick with US sizes of 0-15, easy to measure rings and read accurate sizeRing Sizer Guage Set made of plastic, US size(0-15), come in half sizes, 32 pieces rings looped with a flexible cable which comes with a screw connection that can be opened easilyTwo finger gauge is made of durable plastic, measures fingers from size 1-17, works like a belt that you adjust around the finger.With this ring sizing tool you can easy to know which size you need, then give your husband/ wife, girlfriend / boyfriend a correct size ring as a surprise gift. Product Description Accmor Ring Sizing Kit with superior quality are great tools for Jewelry ring making, easy to use at home or on glass showcases, a perfect set for professionals and beginners to quickly figure out the sizes of rings and fingers, give your husband/ wife, girlfriend / boyfriend a correct size ring as surprise gift. There are 4 types of measure sizes stick on the Ring Sizer Mandrel : American size (US), Hong Kong size (HK), Japanese size (m/m ∮）, European size (CU). The front and back measure sticker sides are designed in flat for your easier reading size, and both sides are graduated rolling grooved design is to keep rings in level when measuring. The Finger Sizing Gauge is used to measure finger size. 0-15 US Standard Size Codes including half size increments are clearly marked on each ring. 32 pcs small rings are looped by a flexible cable and they can be taken out separately for easier measurement! Two Pcs Finger Measuring Gauges are made of plastic, to measure fingers sizes from size 1-17. It is lightweight, durable, portable and reusable. Works like a belt by adjusting it around your finger. Handy and easy to use at home or carry with your travel accessories. Kindly Please Note: 1. Due to subjective factors between people or other uncontrollable objective factors while measuring, there may be on error of size 0.25 between rings, fingers and our measure tools. But in most cases, the size is accurate and error free. 2. Our this ring sizer tool are all made of plastic, if you prefer metal one, we would like to recommend you to have a look at our other metal ring sizer mendrel also sold from our store