Ring Sizer

Ring SizeTable
Uptown Spinners US Size Chart 
US SIZE Circumference (mm) Diameter (mm)
5 49 15.7
6 52 16.5
7 55 17.3
8 57 18.1
9 59 18.9
10 62 19.8
11 64.6 20.6
12 67.2 21.4
13 70 22.3
14 72.5 23.1
Diameter- Measure a ring that fits. 

Circumference- 

Follow steps: 

You will need string and a marker or pen.