How to Find Your Ring Size—And Discreetly Get Your Partner’s Too
Finding your ring size doesn’t need to be a guessing game—learn the best methods to measure accurately, avoid pitfalls, and clever tricks for secretly sizing your partner’s finger.

When it comes to buying rings, one of the most important and often overlooked details is finding your correct ring size. As a diamond and jewelry expert, I’ve seen many instances where a beautiful ring became a source of frustration simply because it didn’t fit properly. Finding the right size is crucial, whether you’re shopping for yourself or planning a surprise for someone special.
Meet the Expert

- Grant Mobley is the Jewelry & Watch Editor of Only Natural Diamonds.
- He is a GIA Diamonds Graduate.
- He has over 17 years of jewelry industry experience, starting with growing up in his family’s retail jewelry stores.
So, here’s everything you need to know about accurately determining your ring size.
The Best Way to Determine Your Ring Size
Hands down, the most accurate and reliable method for finding your ring size is visiting your local retail jeweler. Any reputable jewelry store will gladly measure your finger at no charge. Professional jewelers use ring-sizing tools known as ring mandrels or sizing gauges, designed specifically for precise measurements. This quick and complimentary service ensures a perfect fit, eliminating guesswork or costly resizing.
Home Methods for Finding Your Ring Size

If visiting a jeweler isn’t an option, you can still measure your ring size accurately at home. The best method involves purchasing an inexpensive ring sizing tool online. Available for less than $10 at major retailers like Amazon, ring sizing tools provide accurate measurements and are far superior to other popular yet unreliable at-home methods.
Pro tip: Many websites suggest wrapping a piece of string or paper around your finger to estimate size. While convenient, these methods often yield inaccurate results due to human error, variations in the thickness of the string or paper, and inconsistencies in measurement. Avoid these methods if possible to prevent disappointment later on.
Understanding Finger Size Differences
One crucial detail that many overlook is that every finger is likely to be a different size; even the same finger on opposite hands usually varies. So, if you’re sizing your ring finger, ensure it’s the exact finger on the correct hand. Additionally, it’s perfectly normal for your finger size to fluctuate slightly, sometimes by as much as half a size, due to factors such as temperature and recent sodium intake. Fingers typically expand slightly in warmer conditions and contract in cooler temperatures.
International Ring Sizing Considerations
Another essential factor is understanding that ring sizes differ globally. The US, UK, and European sizing systems each follow their own measurement standards. Therefore, when communicating your size to a jeweler or making a purchase online, clarify the measurement standard used to ensure accuracy.
How to Secretly Determine Your Partner’s Ring Size

Planning a surprise proposal or gift can make finding your partner’s ring size more challenging, but it’s not impossible. Here are some clever tips:
Browse Jewelry Stores Casually: When shopping together, stop by jewelry stores to “casually” browse. Take the opportunity to ask the salesperson to size your fingers, and encourage your partner to do the same, just out of curiosity.
Enlist Friends or Family: Ask a friend or family member to visit a jewelry store with your partner when you’re not around. This method is subtle and often less suspicious.
Borrow an Existing Ring: If your partner already wears a ring on the desired finger, discreetly borrow it temporarily and have it professionally measured by a jeweler for a perfect fit. Make sure you measure the exact finger you’re shopping for, or you’ll get the wrong size.
Choosing a Ring Size When You’re Unsure
If none of the discreet methods are feasible, consider selecting a ring in an average size and adjusting it later. Remember, the average ring size for women is approximately 6.5 in US measurements, and for men, it’s about 9 in US measurements. When guessing, err slightly on the larger side because it’s generally easier for jewelers to size rings down rather than up. However, keep in mind that certain ring styles, such as eternity bands or rings with gemstones fully encircling the band, are difficult or impossible to resize. Always verify with your jeweler if resizing is possible for your chosen ring. If it is not possible, do not take the risk of guessing the size.
Final Thoughts

Accurately determining your ring size ensures that your new ring fits comfortably and securely, allowing you to appreciate its beauty and significance fully. Whether you’re shopping for yourself or someone special, taking the time to measure your ring size accurately will pay off with a lifetime of wear and enjoyment. When in doubt, consult your local jeweler for guidance—they are always happy to help ensure your jewelry experience is perfect.