1. Borrow a ring
The easiest option is to get your hands on a ring of theirs. If you can borrow a ring without them noticing for a day, you can take it to a jeweler to have it sized. Or even better, you can use Eternate’s free ring size guide to find out accurately what their ring size is. All you have to do is place the ring on the guide to find the matching size. Just remember to make sure the ring you borrow is one that she wears on the same finger! Our dominant hands tend to be slightly bigger.