This is a Steel finger ring sizer. You can measure 1/2 to 131/2 US fingur size. Our ring measuring tool sizer has 27 sizes in total. It's made for the US and CANADA, but can suitable for the all other country. Comprehensive Sizes - Includes Half Sizes. Each ring is curved with USA Sizes 1-13 including 1/2 half size increments. Our range measures child fingers to largest fingers.Ring size increments are clearly marked on each ring, easy to use and measure your ring size correctlyEasy to Separate - The sizes are stamped on the stem of each ring and come on a flexible cable with a screw connection for you to open if neededMade of Stainless Iron Material - Durable and ensures long term application without rusting.

Custom size and design possible, please contact with me for more details. Also contact with me for other contry's finger ring sizer.

Note For 3d printing: Before print make sure compression of you printing materials after print. According to compression of your materials you have to scale upthe tools 3d model. Tools measurements are accurate, no clearance given. Printing resolution should be less than 0.01mm.

Thanks,Mahbub