1. Determine Ring Size by Millimeter

　

US Size

AU Size

 HK Size

Diameter (mm)

Inch

Perimeter (mm)

5

I-J

 10.5

16

1 15/16

50.2
6 L 13.5 16.5 2 1/16 51.8

7

N-O

 15.5

17.5

2 1/8

55
8 P-Q 17.5 18 2 1/4 56.5

9

R-S

 19

19

2 5/16

60
10 T-U 21 20 2 7/16 62.8
11 W-X 24 21 2 9/16 65.9

　

2. Measure Ring Size With a Finger Size Strip

Note: You need the "Adobe Reader" to view the PDF file

　

Print Finger Size Strip here

(Finger Size Strip is US Size, not mm)

To create your own ring sizer, print and cut the strip below. Insert the narrow end of the sizer through the "cut here" slot. With numbers on the outside, place the loop around your finger, and pull until the fit is snug but comfortable