How to Measure Your Ring Size at Home
How-To Guides
Figuring out how to measure your ring size at home is easier than you think, and getting it right means no awkward returns, no rings flying off in the cold, and no surprise resizing bills. With a strip of paper or a ring you already own, you can nail your size in a couple of minutes.
Two Easy Methods
Method 1: The Paper or String Strip
This measures the circumference of your finger.
- Cut a thin strip of paper or grab a piece of string about 4 inches long.
- Wrap it snugly around the base of the finger you want to fit, just below the knuckle.
- Mark where the end overlaps with a pen.
- Lay it flat against a ruler and measure the length in millimeters. That length is your finger circumference.
- Match the millimeters to the chart below to find your size.
Method 2: Measure a Ring You Already Own
If you have a ring that fits the right finger well, measure the inside diameter across the middle in millimeters, then match it on the chart. This is a great cross-check.
US Ring Size Chart
| US Size | Inside Diameter (mm) | Circumference (mm) |
|---|---|---|
| 5 | 15.7 | 49.3 |
| 6 | 16.5 | 51.9 |
| 7 | 17.3 | 54.4 |
| 8 | 18.1 | 57.0 |
| 9 | 19.0 | 59.5 |
| 10 | 19.8 | 62.1 |
| 11 | 20.6 | 64.6 |
| 12 | 21.4 | 67.2 |
Tips for an Accurate Measurement
- Measure at the end of the day when fingers are at their largest, so the ring won't be too tight.
- Avoid hot or cold extremes. Fingers shrink in the cold and swell in the heat. Aim for a normal, room-temperature day.
- Measure two or three times and take the average for reliability.
- Account for the knuckle. If your knuckle is much larger than the base of your finger, size to slide over the knuckle comfortably.
- Mind the band width. Wide bands fit tighter, so consider going up a half size for chunky rings.
Common Mistakes to Avoid
Pulling the paper strip too tight gives a size that's too small, while a loose wrap gives one that's too big. String can stretch, so paper is usually more accurate. And never measure a cold finger first thing on a winter morning, since you may end up with a ring that slips off later in the day.
What If a Ring Doesn't Fit?
Most rings can be resized by a jeweler, usually up or down a size or two without trouble. Costs vary with the metal, the band style, and how many sizes you need to change. To get a ballpark before you visit a jeweler, try our ring resize cost estimator. Keep in mind that eternity bands and rings with stones all the way around are much harder (and pricier) to resize.
Knowing Your Ring's Value Too
While you're measuring, it's a great moment to record details about the ring itself. If it's gold, you can estimate its worth with our scrap gold calculator or read how much a 14k gold ring is worth to understand what drives the price.
How BigStash Helps
BigStash.app is a handy place to store each ring's size, photos, and value all in one spot, so you always know your size for future purchases and gifts, and can track what your jewelry is worth over time.
Frequently Asked Questions
What's the most common ring size?
For women, US sizes 6 to 7 are most common; for men, sizes 9 to 10. Yours may differ, so always measure rather than guess.
Can every ring be resized?
Most can, but eternity bands, rings with stones around the entire band, and certain metals like tungsten are difficult or impossible to resize. Check with a jeweler first.
Should I size up for a wide band?
Yes. Wide bands sit tighter on the finger, so going up a half size usually makes a chunky ring comfortable.