Find your
exact size.
Real meteorite locked in black tungsten. Built for the long fight — not the short season.
Get the fit right
before we forge.
Tungsten cannot be stretched or cut down like gold. Measure once, carefully — or let us send a free sizer home with your order.
Free home ring sizer
Choose Free ring sizer on any product page. We send the sizer with your order and forge your ring once you confirm the size — typically 2–3 months from confirmation for made-to-order pieces.
Measure a ring you own
Place a well-fitting ring on a ruler and read the inside diameter in millimetres. Match it to the diameter column in the chart below.
Visit a jeweller
Any high-street jeweller can size your finger in seconds. Ask for a US size, or take a UK letter and convert it with our chart.
US, UK and EU
side by side.
We build every ring to US sizes. On product pages you can switch between US and UK labels — the underlying size stays the same.
| US / CA | UK / AU | EU | Circ. (mm) | Dia. (mm) |
|---|---|---|---|---|
| 4.0 | H | 47 | 46.68 | 14.82 |
| 4.5 | I | 48 | 47.75 | 15.20 |
| 5.0 | J | 49 | 49.07 | 15.62 |
| 5.5 | K | 50 | 50.35 | 16.03 |
| 6.0 | L | 51 | 51.58 | 16.42 |
| 6.5 | M | 52 | 52.27 | 16.64 |
| 7.0 | N | 54 | 54.52 | 17.23 |
| 7.5 | O | 55 | 55.32 | 17.61 |
| 8.0 | P | 56 | 56.73 | 18.06 |
| 8.5 | Q | 58 | 57.71 | 18.37 |
| 9.0 | R | 59 | 59.12 | 18.82 |
| 9.5 | S | 60 | 60.72 | 19.33 |
| 10.0 | T | 61 | 62.04 | 19.75 |
| 10.5 | U | 63 | 63.24 | 20.13 |
| 11.0 | V | 64 | 64.43 | 20.51 |
| 11.5 | W | 65 | 65.81 | 20.95 |
| 12.0 | X | 67 | 67.07 | 21.35 |
| 12.5 | Y | 68 | 68.17 | 21.70 |
| 13.0 | Z | 69 | 69.30 | 22.06 |
| 13.5 | Z1 | 70 | 70.62 | 22.48 |
| 14.0 | Z2 | 72 | 71.84 | 22.87 |
| 14.5 | Z3 | 74 | 73.98 | 23.55 |
| 15.0 | Z4 | 75 | 75.40 | 24.05 |
Circumference and diameter are inside measurements. Half sizes are available across the full range. Highlighted rows are the most common men’s (10) and women’s (6) sizes.
A few rules for
an honest fit.
Fingers change through the day. Measure more than once, and favour the reading that clears the knuckle without spinning freely.
Measure at the end of the day
Fingers swell slightly by evening. That reading is closer to how the ring will feel when you wear it.
Wider bands fit tighter
An 8mm Rokkard often needs a half size up from a slim band. If you are between sizes, go larger for wider widths.
Clear the knuckle
The ring should pass the knuckle with a firm push, then sit snug on the finger without spinning freely.
Avoid cold hands
Cold weather shrinks fingers. Warm up before measuring, or you may order a size that feels tight indoors.
Wrong size?
We sort it.
Tungsten cannot be resized on a jeweller’s mandrel. Instead we exchange your ring for the correct size — covered by our lifetime resizing warranty.
One free size exchange after delivery if the fit is off. Start from your account or reply to your order email.
If your size changes later, we exchange for a new size for life. The original ring is not returned.
Not ready to commit to a size? Add the free home sizer on the product page and send your measurement back when you have it.