Men's Ring Size Guide
Most of our bands run US size 8 to 12, including half sizes. To find yours, measure the circumference of your finger in millimetres and match it to the chart below — then apply the two adjustments for comfort fit and band width. The whole process takes about two minutes.
Tungsten carbide and titanium cannot be resized after they leave the workshop, so it is worth getting this right the first time. This guide covers how to measure accurately at home, the full size chart, and the mistakes that account for most exchanges.
Why Ring Size Matters More With These Materials
A gold band can be cut, stretched, and soldered back together by any jeweler. Tungsten carbide and titanium cannot. Tungsten sits at 9.0 on the Mohs hardness scale — the property that makes it almost impossible to scratch also makes it impossible to work with standard sizing tools. Titanium is tough enough that the same limitation applies in practice.
This is not a drawback of the material so much as a consequence of it. But it does mean the size you order is the size you keep, so the two minutes spent measuring properly are worth more here than with a conventional band.
How to Measure Your Ring Size at Home
Three methods, in order of how much we trust them.
Method 1: A ring that already fits (most accurate)
If you own a ring that fits the correct finger comfortably, measure it rather than your finger. Lay it flat and measure the inside diameter across the widest point with a ruler marked in millimetres. Match that number to the diameter column in the chart below.
One caution: measure a ring of similar width to the one you are buying. A 3mm band and a 9mm band that both fit the same finger will not be the same size.
Method 2: Paper strip or string
Cut a strip of paper about 5mm wide and long enough to wrap around your finger. Paper is better than string, which stretches and gives a reading half a size small.
- Wrap the strip snugly around the base of the correct finger — firm, but not tight enough to indent the skin.
- Slide it over your knuckle. This step is the one people skip, and it is the one that matters. If the loop will not pass over your knuckle, the ring will not either.
- Mark where the strip overlaps, lay it flat, and measure to the mark in millimetres.
- Match that number to the circumference column below.
Method 3: A physical ring sizer
A set of plastic or metal sizing rings costs very little and is more reliable than either method above, because you are testing an actual ring rather than approximating one. If you are buying a band you intend to wear for decades, it is worth the wait.
We would avoid printable paper sizers. They are only accurate if the page prints at exactly 100% scale, and most printers quietly shrink to fit the margins — which produces a confidently wrong answer rather than an obviously wrong one.
Men's Ring Size Chart
Find your measurement in the millimetre columns and read across to the US size. If you fall between two sizes, note both — the adjustments in the next section will tell you which way to go.
| US size | Inside diameter (mm) | Inside circumference (mm) | Inside circumference (in) |
|---|---|---|---|
| 4 | 14.86 | 46.7 | 1.84 |
| 4.5 | 15.27 | 48.0 | 1.89 |
| 5 | 15.70 | 49.3 | 1.94 |
| 5.5 | 16.10 | 50.6 | 1.99 |
| 6 | 16.51 | 51.9 | 2.04 |
| 6.5 | 16.92 | 53.2 | 2.09 |
| 7 | 17.35 | 54.5 | 2.15 |
| 7.5 | 17.75 | 55.8 | 2.20 |
| 8 | 18.19 | 57.1 | 2.25 |
| 8.5 | 18.53 | 58.2 | 2.29 |
| 9 | 18.95 | 59.5 | 2.34 |
| 9.5 | 19.41 | 61.0 | 2.40 |
| 10 | 19.84 | 62.3 | 2.45 |
| 10.5 | 20.20 | 63.5 | 2.50 |
| 11 | 20.68 | 65.0 | 2.56 |
| 11.5 | 21.08 | 66.2 | 2.61 |
| 12 | 21.49 | 67.5 | 2.66 |
| 12.5 | 21.89 | 68.8 | 2.71 |
| 13 | 22.33 | 70.2 | 2.76 |
Sizes shown in bold are the range we stock across most of the collection. The average men's ring size in North America falls between 9 and 10.
The Two Adjustments Most Size Guides Skip
A raw measurement is a starting point, not an answer. Two properties of the ring itself change what size you actually need, and they pull in opposite directions — which is why sizing advice online so often contradicts itself.
Comfort fit: go down half a size
Every ring we make is comfort fit, meaning the inside of the band is gently domed rather than flat. Less of the ring touches your finger, and the curved edge slides over the knuckle instead of catching on it. The practical effect is that a comfort-fit ring feels looser than a standard-fit ring of the same size.
So if a jeweler measured you at a standard-fit size 9, a comfort-fit 8.5 is usually the better match.
Band width: go up half a size
A wide band covers more of your finger, creating more contact and more friction. An 8mm ring in your usual size will feel tighter than a 4mm one, and it has further to travel over the knuckle.
- 4mm to 6mm: true to your measurement
- 6mm to 7mm: consider half a size up if you are between sizes
- 8mm and wider: half a size up, sometimes a full size if you have prominent knuckles
Putting them together
Because our bands are all comfort fit, the two adjustments partly cancel out. The practical rule:
- Narrow bands, 4mm to 6mm: take half a size down from a standard-fit measurement.
- Mid-width, around 7mm: stay true to your standard-fit measurement.
- Wide bands, 8mm and up: stay true to your standard-fit measurement. Do not go down half a size — the extra width has already taken up that room.
If you were measured on a comfort-fit sizer rather than a standard one, use that number directly and apply only the width rule.
When Should I Measure My Finger?
Timing changes the answer by up to a full size, which is more than most people expect.
Measure at the end of the day, when your hands are warm. Fingers are at their smallest first thing in the morning and swell through the day with heat, activity, salt, and alcohol. A ring sized to a cold morning finger will feel tight most evenings.
Things to avoid: measuring straight after exercise or a hot shower, when fingers are temporarily larger; measuring in cold weather or with cold hands, when they are temporarily smaller; and measuring only once. Take a reading on three different days and use the largest.
What If I'm Between Two Sizes?
Size up. This is the single most useful sentence on this page.
A ring slightly too large sits comfortably and spins a little. A ring slightly too small is genuinely difficult to remove, uncomfortable in warm weather, and a real problem if your hand ever swells from injury or illness. Given the choice between a band that turns on your finger and one you cannot get off, the first is a far better problem to have.
This applies with more force to wide bands, which have less tolerance in both directions.
Common Sizing Mistakes
- Measuring the wrong hand. For most people the dominant hand is half a size larger. Measure the finger the ring will actually live on.
- Using string. It stretches under tension and consistently reads small.
- Skipping the knuckle test. A loop that fits the base of your finger is useless if it will not travel over the joint.
- Measuring a partner's finger while they sleep. Fingers are at their smallest at rest, and this is how surprise proposals end up a full size under.
- Borrowing a size from a different ring. Width, fit profile, and which finger it was worn on all change the number.
- Pulling the strip tight. Snug means it holds its position, not that it leaves a mark.
Frequently Asked Questions
Can a tungsten or titanium ring be resized?
No. Tungsten carbide's hardness and titanium's toughness both put them beyond standard sizing tools — a jeweler cannot cut and solder them the way they would gold or silver. If the size is wrong, the ring is exchanged rather than altered.
What is the average men's ring size?
In North America, between 9 and 10. That is a useful default if you are buying a surprise gift with no other information, but it is a guess, not a measurement — roughly half of men fall outside that range.
What sizes do you make?
Most of our collection runs US 8 through 12, including half sizes. A few designs extend further down. If you need a size outside the range shown on a product page, contact us before ordering and we will tell you whether it can be built.
How do I measure my partner's finger without them knowing?
Borrow a ring they already wear on the correct finger and measure its inside diameter, which is the most reliable option. Failing that, ask someone with the same build to compare hands, or accept that a size 10 with a planned exchange is a reasonable position to be in. Avoid measuring while they sleep — resting fingers read small.
Should I size up for a wide band?
Usually yes for a standard-fit ring. For our comfort-fit bands, an 8mm and wider should be ordered true to your standard-fit measurement rather than half a size down — the width has already used up the slack that comfort fit would otherwise create.
My ring spins on my finger. Is it too big?
Not necessarily. Some rotation is normal and expected, particularly on fingers that taper. The real test is the knuckle: if the ring comes off with a firm, deliberate pull but does not slide off on its own, the fit is right. If it moves past the knuckle without resistance, it is too large.
What if I order the wrong size?
We have a 30-day window for exchanges on unworn rings in their original condition. Because these materials cannot be resized, an exchange means building a new ring rather than adjusting the one you have, so reach out as soon as you know. Full details are on our return policy page. Custom pieces cut from a specific meteorite or fossil specimen are final sale, which is another reason to measure carefully before ordering one.
Still Not Sure?
If you are between sizes, buying a surprise gift, or choosing an unusually wide band, ask before you order rather than after. Get in touch with your measurement and the ring you are looking at, and we will tell you what we would order in your position.
Once you have your size, browse the meteorite rings, tungsten rings, wood rings, and titanium rings collections — every band ships free across the US and Canada with a lifetime warranty against manufacturing defects.