1. Wrap a thin piece of string around the base of the finger you want to measure.
The Most Common Ring Sizes
The most commonly purchased women's ring size at YATIS is Size 7. The most commonly purchased men's ring sizes at YATIS range from size 9 to 10.
Are you Buying the Ring as a Surprise?
Borrow one of your friends/family/partner's rings and slide it down a tapered candle. Measure the circumference of the candle where the ring stops.