Ring Size Guide: How to Measure Your Ring Size at Home

You don’t need a jeweler or a special tool to find your ring size. You need a strip of paper and two minutes. Here are the two reliable at-home methods, a full US size chart, and the secondhand-buying tips that save you from a ring that doesn’t fit.

Method 1: the paper-strip method

Cut a thin strip of paper (or grab a piece of string). Wrap it snugly around the base of the finger you’re sizing, mark where it overlaps, and lay it flat against a ruler. That length in millimeters is your finger’s circumference. Find it on the chart below.

Two things that matter more than people think: measure at the end of the day (fingers swell as the day goes on, and you want the ring to fit then too), and make sure the strip slides over your knuckle, since the knuckle is usually wider than the base. If you’re between sizes, round up.

Method 2: measure a ring you already own (most accurate)

Take a ring that already fits the right finger and measure its inside diameter in millimeters, straight across from one inner edge to the other. Match that to the chart. This is the most accurate way to do it at home because you’re measuring something that already fits, no guessing about snugness.

US ring size chart

Half sizes sit right between these (a 6.5 is about 16.9 mm inside diameter). For reference, women most commonly land at a 6 or 7 and men at a 9 or 10, but that’s a starting point, not a substitute for actually measuring.

A few things the charts don’t mention

• Wide bands run small. A chunky 8 mm band feels tighter than a dainty 2 mm one at the same size, so size up a half for wide rings.
• Your fingers aren’t the same. Dominant hands tend to run slightly larger, and your ring finger isn’t your index finger. Always measure the actual finger.
• Temperature counts. Cold fingers shrink. Don’t measure straight out of the cold or you’ll size too small.

Buying rings secondhand: the resizing question

The nice thing about buying pre-loved is that vintage and estate rings come in every size, not just the ones a manufacturer decided to stock. The thing to check before you buy is whether a piece can be resized if it’s a touch off. Most solid gold and silver bands resize up or down a size or two easily. What usually can’t: eternity bands (stones all the way around), tungsten and titanium, and a lot of costume rings. Factor a possible $30 to $60 resizing into your budget before you fall in love with something a half size off.

On StillSparkly, ring size is listed on the piece itself, so you can buy to your number instead of crossing your fingers. (Pun fully intended.) And if you’re selling, listing the exact size is one of the easiest ways to help your piece sell, since a buyer who knows it’ll fit is a buyer who actually checks out.

Shop pre-loved rings by size on StillSparkly.