Your ring should be fit enough to keep it from slipping off your finger.
Finger size changes depending on the time of day and the weather. For best results measure your finger size
1. When your fingertips are warm at the end of the day (Fingers are smaller in the early morning and when cold.)
2. To eliminate an erroneous reading, measure your finger size three to four times.
Ring Sizes In The United States of America
Ring sizes for women commonly range from 3 to 9. Sizes 5 to 7 are the most commonly purchased women's ring sizes. The most popular ring size is 6. Ring sizes for men commonly range from 8 to 14. Sizes 8 to 12 are the most regularly purchased men's ring sizes. The most popular ring size is 9. Take a look at the size chart below.