Fit
Printable ring sizer
Print this page at 100% scale. Measure the black bar with a ruler. It should be 100 mm before you trust the rest. This is a fit aid, not a medical tool.
On a phone, scroll the bars sideways. Set the print scale to 100% before you measure. Size guide · Need a different size?
Check this first
100 mm
35 mm35 mm inner · 110.0 mm around
40 mm40 mm inner · 125.7 mm around
45 mm45 mm inner · 141.4 mm around
50 mm50 mm inner · 157.1 mm around
55 mm55 mm inner · 172.8 mm around