It's not easy to size up a small ring, so larger is always better if you go this route. Go for a larger size: If you're not sure the person's exact size, you can purchase a larger-than-average one and get it resized later.

Or if a friend or family member has similarly sized hands as the person you're shopping for, you might have them try on rings and purchase one of a similar size. Ask their friends and family: Other people who know this person well might already know their ring size, so it doesn't hurt to ask.Take a look at their other jewelry: If you can find another ring in their jewelry collection that fits them, you can measure that with a piece of string or take it to a jewelry store to get help comparing sizes.There are a few different ways you can find someone's ring size if you're trying to surprise them: