International Ring Size Chart

Circumference (mm) US HK 
47.8 4.5 9
48.7 4.75 10
50.0 5.25 11
50.9 5.75 12
51.8 6 13
52.8 6.5 14
53.7 7 15
55.3 7.25 16
56.5 7.75 17
57.5 8.25 18
58.4 8.75 19
59.7 9 20
How to Measure Your Ring Size At Home?
  1. Use a piece of string and wrap around your finger.
  2. Mark and unwrap the string
  3. Use a ruler to measure the string that fully wraps around your finger.
  4. This measurement give you the circumference.
  5. Use the chart above to determine which ring size that fits you the best.