How Do You Find a Woman’s Ring Size Without Her Knowing?

Last Updated on December 29, 2023

Imagine this: You’re ready to pop the question to your girlfriend, you decided on a date to do it, you have the location picked out, and you know exactly what you’re going to say to her. The only problem is that you want to keep it a surprise, but you don’t know her ring size.

So, how do you find out her ring size without her knowing?

Many others have faced this problem before you and—because of this—there are plenty of ways to find out a woman’s ring size without her knowing. The most reliable ways include borrowing one of her rings or asking a friend or family member for help.

However, these tactics do require some skill and sneakiness. Luckily for you, this article provides detailed instructions for how you might go about using each tactic successfully.


How Do You Find a Woman’s Ring Size Without Her Knowing?

Finding out a woman’s ring size without her knowing is probably the most difficult part of any proposal. If it becomes too difficult and there’s absolutely no way you can find out your girlfriend’s ring size without her knowing, then you can always ask her directly for her ring size.

The surprise element goes out the window, but at least you’ll know her ring size is correct.

Yet, if you are set on keeping the engagement a surprise, then there are a couple faithful ways that you can find out her ring size without her evening knowing what you are up to.

Borrow One of Her Rings

Borrowing one of your girlfriend’s rings is the easiest and most reliable way to find out her ring size.

The trick with this one is waiting for the ideal time to borrow one of her rings without her noticing that it is gone. It might be beneficial to wait until she’s out of town for the weekend—or at least gone for the day—and then borrow the ring to take straight to the jewelry store.

If you can’t find a time when she is out of the house long enough for you to borrow a ring and take it directly for a sizing, there’s also the option to just borrow a ring for a moment—maybe while she’s in the bathroom—and trace it out onto a piece of paper. This way, you can just take the paper to the jewelry store, and they should be able to provide an accurate ring size.

There is one other factor you may wish to take into account with this method, though. It is important to borrow a ring that you’ve seen her wearing on one of her ring fingers. If you borrow a ring that she regularly wears on her index finger or middle finger, then you may end up getting her a ring that does not actually fit her ring finger.

Ask a Friend or Family Member

If you’re unable to borrow one of her rings yourself, there’s a good chance that she has a friend or family member that might know her ring size. Perhaps they got her a ring for a special occasion in the past and they still have her ring size saved somewhere for future reference.

Another way you can recruit either a friend or family member is to ask one of them to actually take her ring shopping, just for fun. Let them know that they need to be subtle and sneaky, though. With this method, you can also ensure that you have the most up-to-date ring size.

Can You Estimate Ring Size by Height and Weight?

Although it’s not the most reliable method to find out a woman’s ring size without her knowing, you can technically get a rough estimate of her ring size using her height, weight, and hand size.

Generally speaking, the shorter, lighter, and daintier a woman is, the smaller the ring size.

For instance, if your girlfriend is around 5’3”, is below average weight, and has small hands with delicate fingers, there’s a good chance that her ring size is between 4 and 5 (US sizing). This is—of course—just an estimate.

If you are going to use this method to help determine your girlfriend’s ring size, then it is also a good idea to get a size larger than your estimation. This is preferred because—if, for some reason you need to get the ring resized—it is typically easier to size-down than size-up.

Eran Hayo is the Chief Editor of Jewels Advisor, with over 5 years of experience in the fields of jewelry and memorabilia. He built Jewels Advisor to serve one main purpose – to teach you everything he knows about jewelry, and help you make better-informed decisions when buying diamonds and engagement rings online. His work has been cited on famous publications such as The Sun, MSN and WikiHow.