Not sure of your ring size? You're not alone — it's the most common question we get. Our rings come in sizes 3.5 to 9.5, in quarter sizes, so we can almost always land on a fit that feels right.
How to measure at home
Option 1 — measure a ring that already fits. Lay it flat and measure the inside diameter (straight across the center of the opening) in millimeters. Match it to the chart below.
Option 2 — measure your finger. Wrap a thin strip of paper or string around the finger, mark where it overlaps, and measure that length in millimeters. That's the inside circumference in the chart below.
A few tips: measure at the end of the day (fingers run slightly larger), measure a few times and average, and if your knuckle is much wider than the base of your finger, size for the knuckle — the ring has to get over it. Between sizes? Go a quarter size up.
Ring size chart
| US size |
Inside diameter |
Inside circumference |
| 3.5 |
14.4 mm |
45.2 mm |
| 3.75 |
14.6 mm |
45.9 mm |
| 4 |
14.9 mm |
46.8 mm |
| 4.25 |
15.1 mm |
47.4 mm |
| 4.5 |
15.3 mm |
48.1 mm |
| 4.75 |
15.5 mm |
48.7 mm |
| 5 |
15.7 mm |
49.3 mm |
| 5.25 |
15.9 mm |
50.0 mm |
| 5.5 |
16.1 mm |
50.6 mm |
| 5.75 |
16.3 mm |
51.2 mm |
| 6 |
16.5 mm |
51.8 mm |
| 6.25 |
16.7 mm |
52.5 mm |
| 6.5 |
16.9 mm |
53.1 mm |
| 6.75 |
17.1 mm |
53.7 mm |
| 7 |
17.3 mm |
54.3 mm |
| 7.25 |
17.5 mm |
55.0 mm |
| 7.5 |
17.7 mm |
55.6 mm |
| 7.75 |
17.9 mm |
56.2 mm |
| 8 |
18.1 mm |
56.9 mm |
| 8.25 |
18.3 mm |
57.5 mm |
| 8.5 |
18.5 mm |
58.1 mm |
| 8.75 |
18.7 mm |
58.7 mm |
| 9 |
18.9 mm |
59.4 mm |
| 9.25 |
19.1 mm |
60.0 mm |
| 9.5 |
19.4 mm |
60.9 mm |
Measurements are approximate and can vary slightly by ring width — wider bands usually fit a touch snugger.
Still not sure?
Book an appointment and we'll size you in person, or call or text us at (385) 515-9789 — we're happy to help you figure it out before you order.
