Necklace Sizer Mandrel Measure necklaces accurately using our stepped two piece mandrel! Mandrels are tools that provide accurate measurements when measuring objects that are meant to be circular such as bracelets or necklaces. For these items, do not use straight rulers as they do not factor in the inner circumference of an object and will give longer, deceptively false measurements. Avoid upset customers and measure with a mandrel! Made from sturdy PLA plastic. Stepped design provides confident and accurate measurement vs conical designs where your necklace slips and slides down the cone. Deep engraved markings for easy readability Two piece design is stackable and allows you to store the necklace sizer in a 5" tall drawer Much better than folding plastic sheet mandrels that keep disintegrating! Manufactured in the USA