Before you put a ring on it, let's make sure it fits! Keep reading for your all-in-one guide to measure ring size including:
RING SIZING BASICS
WHAT DO RING SIZE NUMBERS MEAN?
Ring sizes in the US and Canada range from size 3 to size 15, with half sizes and quarter sizes available all the way up. These numbers are linked with either the diameter or circumference of the inside of the ring's band. For example, a size 3 has a diameter of 14 mm, while a size 13 has a 22.2 mm diameter.
The difference between a nail-bitingly loose ring and an uncomfortably snug fit can be as small as 1 mm. Even a ½ size adjustment can be very noticeable in terms of comfort. Keep reading for tips to find your perfect ring size fit!
HOW DO RING SIZES WORK?
Standardized ring sizes allow you to easily shop for rings at any jeweler. The most popular woman's ring size is a 6 (16.4 mm diameter) and the most popular men's ring size is a 9 (19 mm diameter). Keep in mind, every finger is a different size and your finger size will likely vary between your left and right hand!
ARE RING SIZES UNIVERSAL?
No, ring sizes vary all over the world. Scroll down for our U.S. and Canada ring size chart plus our easy-to-use conversion chart to find your ring size all over the world!
HOW TO MEASURE RING SIZE AT HOME (if they're in on it)
There's a few different ways to quickly measure ring size. Keep scrolling for our favorite easy-to-use ring sizing tools and pro-tips to get that perfect fit!
1. PURCHASE A RING SIZER ONLINE
The most accurate way to measure ring size at home is with an adjustable ring sizer online. You can find out your ring size to within a quarter of a size - no venturing to the jewelry stores necessary and no second-guessing!
There are three standard types of ring sizers:
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Multi-ring sizer: these ring sizers will have dozens of plastic rings on a central loop. To use, simply try the rings on until you find the one that fits you best. A perfectly fit ring will slide easily over your knuckle, but still fit snug enough to stay put without spinning. You should have to wiggle your ring a little to get it over the knuckle. Ours even ships free!
- Multi-ring sizer tool for wide bands: we created this metal ring sizer specifically for wider bands which fit differently than an average-width ring.
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Sliding belt ring sizer: these ring sizers look like a belt with all the sizes typed on the outside. How to use: Put the sizer over your finger and slide the raised plastic notch until the sizer fits snugly against your finger. Remember, you want it tight enough that it won't come off when you move your hand around, but still comfortable! The number to the left of the plastic notch is your ring size.
2. MEASURE YOUR RING SIZE WITH STRING
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Wrap string or ribbon around your finger where a ring would normally sit.
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Draw a notch where the string or ribbon intersects.
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Use a measuring tape or ruler to measure the outstretched string in milimeteres.
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Are you ready for math class? The length you just measured is your finger's circumference - now divide that number by 3.14 (remember pi?) to get the diameter.
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Consult our printable ring sizer chart below to convert your finger's diameter to your corresponding ring size. Voila, free ring sizer!
3. MEASURE YOUR RING SIZE WITH AN ONLINE RING SIZE CHART
The easiest way to measure ring size at home is with our printable ring sizing chart:
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Find a ring that fits your finger well.
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Print out our online ring size chart and find the circle that matches the inner circumference of your ring. Your own printable ring size calculator!
One caveat: while the ring size chart method is fairly accurate, if you want to be 100% sure, grab one of our ring sizers for a flawless fit!
GET their FINGER SIZED AT A JEWELER
How to measure ring size? The most reliable and accurate measurement will come from an in-person visit to a jeweler – they'll know exactly how a ring should fit and can recommend the perfect ring size measurement. Most jewelers will size you for free whether you're buying from them or not.
Tip: do this as your first stop and wait to have lunch until afterwards - your fingers can swell after meals, drinks, or a big session of retail therapy.
HOW TO MEASURE RING SIZE IN SECRET
Quick Tips to Secretly Find Her Ring Size
Pick up a flexible tape measure, and measure the inside circumference of the ring in mm. Then you can convert that measurement to her ring size online (or let your jeweler know the mm measurement and they can do the work for you!)
ASK A FRIEND or family member
Many ladies have been Pinterest-ing their engagement ring forever and they 100% know their ring size. And, many women have of course shared this tidbit with all the ladies in their life (I mean, in case their man happens to ask). So, check with her mom, best friends, sister, and if they’re not sure, have them covertly ask in casual conversation or while shopping. Tip: don’t give this job to the worst actor or major gossiper in the group!
MEASURE AN EXISTING RING SHE WEARS ON HER LEFT RING FINGER
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Pick up a flexible tape measure and measure the inside circumference of one of her existing rings that she wears on that specific finger. Then you can convert that measurement to her ring size online (or let us know the mm measurement and we can do the work for you!)
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Press the ring into a bar of soap and bring it to a jeweler. They can usually find a similar size from those markings.
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If you only have seconds to measure the ring because she almost never takes it off, slip it onto your finger and make a pen mark exactly where it fits you. Then, head to a jeweler and have them size that part of your finger.
MAKE A GAME OF IT
Say you heard that the size of her palm divided by three equals your partner's ring size. Almost everyone feels the need to test these theories out! This might be a dead giveaway for some, but for those who love some trivia, they might not immediately suspect.
SEND US A PICTURE OF THEIR HANDS
Show us a picture where we can see her hands, and let us know her shoe size, height, weight, and whether she's left or right handed, and we can guess her ring size for you!
PICK A RING THAT CAN BE RESIZED
To ease your mind, pick a ring that can be easily resized (most rings can be - confirm this with your jeweler). That way, it's no big deal if you're off by a bit.
Pro-tip: lean towards a larger size if you're not 100% sure – that proposal will be much sweeter if she can slide the ring on her finger and not have to stop at the knuckle!
IS IT OKAY TO ASK YOUR PARTNER FOR THEIR RING SIZE?
Absolutely! We are big fans of just asking, it's most important that your partner loves their ring and that it fits properly. So if you need some input to achieve that goal - absolutely ask away!
INTERNATIONAL RING SIZE CHART
Most areas of the World measure rings in the same way, however their sizing grades can look a little different. The UK, Australia, and South Africa use an alphabetical sizing system, while other parts of the World like India, Asia, and areas of Europe use numbers (however their values look different from the US system).
To convert US ring size to another country's size measure (or vice versa), you can use this easy ring size conversion chart.
ring sizing PRO-TIPS
TIME OF DAY CAN AFFECT YOUR RING SIZE
Our fingers tend to swell overnight, so it's better to measure in the middle of the day.
DIETARY CHANGES CAN AFFECT YOUR RING SIZE
Our ring sizes can also fluctuate depending on our food and water intake. If you've just eaten a massive amount of salt, your hands can swell up to a half size larger than usual. So, no measuring after an all-night junk food binge!
To get it perfect: try to measure her finger at room temperature, in the middle of the day, when she's had a fairly normal day of eating and drinking.
BAND WIDTH CAN AFFECT THE RING SIZE
Wider bands fit tighter, so if you're considering a thicker band (5mm and larger), you'll likely have to go up a quarter or half size for the perfect fit.
SIZING OF STACKING RINGS
If you plan on stacking to the sky, there's a few things to keep in mind:
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If you're stacking thinner bands (less than 2 mm wide), you can order your true size and can likely stack up to 3 thin bands without them being too snug.
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Once you get to about 5mm or more in your total stack, you'll want to go up about half a size on the top rings.
CLIMATE AND SEASON CAN AFFECT YOUR RING SIZE
Since your hands expand in the heat and shrink in the cold, try to measure her (or his) finger at room temperature. Don't pull out the tape measure right after ice skating, or after a mad dash through an overheated mall!
RING SIZing faq
HOW do i calculate MY RING SIZE?
1. Measure the circumference of your finger with a string or tape measure. 2. Divide that number by 3.14 to get the diameter of your finger. 3. Use our printable ring size chart to convert the diameter to your ring size. You can also use our $5 ring sizer which will give you an extra accurate size!
HOW BIG IS A SIZE 7 RING?
A size 7 ring fits a finger with a 17.3 mm diameter - it is one of the most popular ring sizes in the U.S. and Canada.
WHAT IS THE RING SIZE IN THE U.S.
Ring sizes range from size 3 to size 14 - the average ring size for a woman is a size 6 and the average ring size for a man is a a size 9.
How to figure out ring size in Canada?
Canada follows the same ring sizing measures as the U.S. - use our Printable Ring Sizing Chart to find out your ring size in Canada.
DOES RING SIZE HAVE TO BE EXACT?
It's always better to get your ring size right the first time so you don't have to get your ring resized, however if you do get the wrong ring size, it's not the end of the world! The only exception to that rule is with eternity rings where there are designs or stones all the way around the band - that style cannot be resized.
Also, keep in mind: your ring size changes throughout the day, in different temperatures, and after eating and drinking (more on that below), so to be on the safe side, we recommend your double check your ring size 2-3 times to find the average. The safest bet: get sized in-person at a jeweler for the most accurate expert reading.
DO RINGS COME IN 1/4 SIZES?
Yes, rings do come in 1/4 sizes. While ring sizers only show 1/2 sizes, all jewelers do make rings in 1/4 sizes (including Gem Breakfast). To assess if you need a 1/4 size, the fit on the sizer should be between the full and half size.
DO 1/2 AND 1/4 SIZES REALLY MAKE A DIFFERENCE IN FIT?
Yes, for a ring to fit properly and comfortably it absolutely should be fitted to the closest 1/4 size for your finger. This will ensure your ring won't fall off, or be uncomfortably tight.
WHAT IS THE AVERAGE RING SIZE?
In the US, the average ladies ring size is a 6, and the average men's size is about an 8.5. These are usually the display sizes in jewelry showcases. These are the most common ring sizes you will see in the marketplace.
WHAT DOES A PERFECT RING SIZE FIT FEEL LIKE?
A flawlessly fit ring will slide over the knuckle easily, but still fit snugly enough to stay on (and not spin). You should have to wiggle the ring slightly to get it off. If it slides off too easily you're at risk of losing your ring!
Of course, everyone's fingers fluctuate throughout the day (and definitely throughout their lifetime), but a well-fit ring should see you through most regular daily (and seasonal) changes.
IS YOUR RING SIZE THE SAME AS YOUR SHOE SIZE?
We get this question a lot! The truth: shoe sizes and ring sizes have no connection to each other – any similarities are pure lucky coincidence.
ARE ALL FINGERS THE SAME RING SIZE?
So often, well-meaning gents bring in one of their lady's middle finger cocktail rings for engagement ring sizing. The truth: all your fingers vary in size, even between hands!
What about the ring FINGERS - are they THE SAME SIZE?
Not always! The fingers on your dominant hand are usually larger than those on your non-dominant hand. So, if she's right handed, the ring she wears on her right ‘ring finger' will likely be too big for her true ring finger.
DOES YOUR RING SIZE STAY THE SAME ALL THROUGHOUT YOUR LIFE?
No, our bodies (and fingers) can fluctuate or permanently change as you get older, with pregnancy, and with weight gain/loss. Your ring size may go up or down according to your life situations.
Have any more ring-related questions? Send us a message anytime, we’d love to chat with you!