This is a 3D-printable stepped ring sizer cone covering US ring sizes 3 through 15, designed for jewelers, makers, and anyone needing accurate ring measurements.
Each step is clearly labeled, and the cone includes a side slot so you can easily slide rings on and off without twisting.
Perfect for sizing existing rings or checking fit during custom ring design.
✅ Features
US sizes 3–15
Each step labeled with the ring size
Includes inner diameter (mm) and inner circumference (mm) reference chart
Easy-slide side cutout for quick ring removal
Prints cleanly with no supports
Comfortable shape and smooth transition between steps