Finding the perfect ring size shouldn’t be a guessing game. Whether you’re picking out an engagement ring, wedding band, or a special piece of jewelry, the right fit makes all the difference. A ring that’s too tight can be uncomfortable, while one that’s too loose might slip off.

Finding your ring size is easy, and you can do it at home. Just follow this simple 3-step guide to get an accurate measurement. Then, check our ring size chart to find your perfect fit.

Pick Your Measuring Method

A few ways exist to measure your ring size. You don’t need fancy tools - just a ring you own, a printable guide, or even a piece of string.

Option 1: Use a Ring Sizer (Most Accurate)

- A ring sizer is a tool that lets you test different sizes on your finger.

- Simply slide the sizer onto your finger—it should fit snugly but still move over your knuckle.

- The number or letter displayed on the sizer is your ring size.

Tip: You can order a ring sizer online or pick one up at a jewelry store.

Option 2: Use a Printable Ring Sizer

A printable ring sizer is a quick and convenient tool for finding your ring size using a ring you already own. Simply print the chart and use it to compare your ring to standard sizes. This method is great for double-checking your size before making a purchase.

Get Your Printable Ring Sizer

Option 3: Use a String or Paper Strip (Quick DIY Method)

Step 1: Measure Your Finger

- Cut a thin strip of paper or grab a piece of string.

- Wrap it around your finger’s base, marking where the ends overlap.

- Lay it flat and measure the length with a ruler (in millimeters).

- Match your measurement to our ring size chart (see below).

Important: String can stretch, so don’t pull too tight while measuring.

Step 2: Consider These Fit Factors

Your ring size isn’t always the same - it can change based on different conditions. Keep these factors in mind for the best fit:

- Time of Day Matters – Fingers are smaller in the morning and larger in the evening because of natural swelling. Measure in the evening for the most comfortable fit.

- Temperature Changes Everything – Cold fingers shrink, warm fingers expand. Measure at room temperature for the best accuracy.

- Knuckles Can Affect Fit – If your knuckles are large, go half a size up so the ring slides on easily but still fits securely.

- Band Width Plays a Role – Wider bands feel tighter, so you might need to go up half a size for a thick ring.

Pro Tip: If you’re between sizes, it’s usually best to size up - a jeweler can always adjust the fit if needed.

Step 3: Match Your Size to the Chart

Now that you’ve measured your finger, use our Ring Size Chart to find your perfect match.

Ring Size Chart

Ring Diameter (MM)USA/CanadaUnited KingdomFranceGermanyJapanSwitzerland
14.0 mm.3F441444
14.4 mm.3½G45¼14½5½6⅓
14.8 mm.4H½46½1576½
15.2 mm.4½I½47¾15¼88
15.6 mm.5J½4915¾99½
16.0 mm.5½L50¾1610½10¾
16.5 mm.6M51½16½1212¾
16.9 mm.6½N52¾171314
17.3 mm.7O5417¼1415¼
17.7 mm.7½P55¼17¾1516½
18.2 mm.8Q56¾181617¾
18.6 mm.8½Q½5818½1718½
19.0 mm.9R½59¼191820
19.4 mm.9½S½60¾19½1921
19.8 mm.10T½61¾202021¾
20.2 mm.10½U½62¾20¼2222¾
20.6 mm.11V½64¼20¾2324
21.0 mm.11½W½66212425¾
21.4 mm.12Y67¼21¼2527½
21.8 mm.12½Z6821¾2628¾
22.2 mm.13Z + 169222729¼
22.6 mm.13½Z + 1.57122.6-31

Final Tips for the Perfect Fit

- Measure more than once. Your finger size can change throughout the day.

- Avoid measuring after a workout - your fingers might be swollen.

- Consider borrowing a ring if it's a present. Compare it to our size chart to get an estimate.

- Resizing is always an option. If the fit isn’t quite right, most jewelers offer resizing services.

Learn more about Brilliance ring resizing services.

Ring Size Chart FAQs