How to Find Your Partner’s Wedding Ring Finger Size Without Asking

You’re ready to pop the question and you’ve picked out the perfect engagement ring. There’s just one problem – you don’t know which ring size to choose. You need a way to find out the size of your partner's wedding ring finger.

In this article, you find out how to find your partner's wedding ring finger size without asking them. Learn the trick to ring sizing someone without them knowing. And, learn everything you need to know when sizing your partner for the perfect ring fit.

Tricks for Sizing Your Partner's Wedding Ring Finger Without Asking

A great way to ruin the surprise of popping the question is to ask your partner what size ring they wear. If you are looking for a way to measure your partner's wedding ring finger, without them knowing, these are the solutions. But, before you get into the details of how to secretly find your partner's wedding ring finger size, there are two things you need to keep in mind.

There are several ways of ring sizing your partner, but beware of a couple of common pitfalls. If your partner has large knuckles, consider a ring fit that is a half-size larger to make putting it on and taking it off easier. With ring sizing, err on the side of a half-size too large, since you can always have an engagement ring resized by a jeweler. 

The other thing to keep in mind when sizing your partner's wedding ring finger is temperature. Your partner's finger will slightly swell in warm temperatures, and shrink when the temperature is cool. Take into consideration the climate of your environment at the time you are sizing your partner's ring finger.

So, with this in mind, here are the easy and accurate methods of finding out your partner’s wedding ring size:

Ask Someone Who Would Know

This is the easiest solution to finding your partner's ring size, and the easiest to keep secret – but it isn’t surefire. Ask members of your partner’s friends and family group who would know. Shopping buddies often pick up on things like that, and parents might remember the size of your partner's graduation ring. 

Asking someone else can, however, lead to inaccurate information. As a general frame of reference, the average woman's ring size is a 6, and the average ring size for a man is 10. So, if someone is telling you that your petite girlfriend's ring size is an 8, you should fact check the information for yourself. 

Borrow Another of Your Partner's Rings 

A much more accurate way of finding out your partner's ring size is to borrow another one of their rings for comparison. But, be careful that they don’t realize it’s gone, or you have to make up something – or worse – risk your partner having a breakdown because they suspect theft. 

Borrow a ring that they won’t miss and only wear on rare occasions. Once you have their ring, you have to find out what size it is, and there are a couple of ways of doing that. 

The best option is to bring the ring into a professional jeweler to inspect the size. If that is not an option, you can do it the old fashioned way. Use a pen to trace the inside of the ring on a piece of paper.

If your partner wears a ring every day, and they don’t have any others that fit, you have to get creative. Try to find a time when they will take their ring off, like when they are in the shower or sleeping. Once you have a trace of the inside of the ring, you can size it accurately.

Measure Their Wedding Ring Finger Size When They are Asleep

But, what if your partner doesn’t wear a ring, at all? You have to measure their finger and find out for yourself. But, before you bust out a tape measure, here are some tricks for measuring your partner's ring finger without them knowing. 

The most opportune time to measure your partner’s ring size is, likely when they are asleep. The trick is to refrain from waking them, so prepare your materials beforehand. To make your own ring sizing gauge, you will need a string, a marker, a ruler showing millimeters, and a pair of scissors. 

Every half-size of a ring is .04 millimeters. Cut a piece of string, about 5 or 6 inches in length. Line up your piece of string along the ruler, starting on the zero-mark. 

Begin with size-3, at 14mm, and mark every .04mm, or half-size, up to 20.6mm. A woman's average size-6 ring is 16.5mm in diameter, whereas a man’s size-10 is 20.2mm. 

Since you are conducting a covert mission with an objective of accuracy, the easiest way to delineate between ring sizes is to use different colored markers for each size after size-5. The room will, likely, be dark, and color differentiation will help you accurately take a measurement.

The engagement ring finger is next to the pinky on the left hand. Engagement rings are meant to be worn often, so they should fit comfortably – without being too tight. This is convenient when taking your measurement, as you do not want to wake your partner in the process. 

Go Get Your Engagement Ring in the Right Size

Once you have your wedding ring finger measurement, you are ready to buy the perfect engagement ring. Err on the side of going a half-size larger than your measurement, if it is a close call between ring sizes. You are going to do great!

If you need help finding the right size of your partner's wedding ring finger, consult a professional jeweler, today. And, consider a custom engraving on your partner's ring, to make the proposal that much more memorable. Here’s to you!