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Onyx Rectangle Stone Signet Ring (Silver)
¥7,800
¥11,100SAVE 29%
Fair Pricing
Premium quality, without the premium markup.
The same materials used by luxury houses — direct to you.
£15–30
Fast Fashion
£59–69
CRAFTD
£500+
Fine Jewellery
Loved by 1,000,000+ others
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Lifetime Guarantee
Every piece covered, for life.
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20,000+ 5-Star Reviews
From verified buyers.
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18k Gold & Rhodium
Water, heat and sweat-proof.
Lifetime Warranty
Your jewellery is CRAFTD to Last.
But sometimes, accidents happen. That’s why every piece comes complete with a Full Lifetime Warranty.
Snapped a chain? Damaged a pendant? We got you.
Please note: our Lifetime Warranty only covers accidental damage. If your piece is lost, stolen or damaged via a third party, we can’t cover this.
Onyx is known to enhance self-confidence and discipline.
A silver signet is an essential in every man’s collection. This classic piece features a sleek onyx gemstone, hand-set within a premium Cabochon inlay—an expert technique that brings out the stone's richest, deepest colour. Its superior, scratch-resistant coating protects its natural shine, while the brushed inner shank ensures all-day comfort. Wear yours solo or stack it with other styles—either way, it’s a timeless ring that will stay with you for a lifetime.
Your jewellery is CRAFTD to Last.
But sometimes, accidents happen. That's why every piece comes complete with a Full Lifetime Warranty.
Snapped a chain? Damaged a pendant? We got you.
Please note: Our Lifetime Warranty only covers accidental damage. So heads up – If your piece is lost, stolen or damaged via a third-party, we can’t cover this.
- Standard £4.99 or FREE over £75 (2-3 Working Days)
- Next-Day from £5.99 (1-2 Working Days)
Men's Ring Size Guide
How To Find Your Size
For Rings with Sizes 7 - 13
| Size | Inner Circumference (mm) | Inner DIM (mm) |
| 7 (O) | 54.4 | 17.32 |
| 7.5 (P) | 55.7 | 17.73 |
| 8 (Q) | 57 | 18.14 |
| 8.5 (R) | 58.3 | 18.56 |
| 9 (S) | 59.5 | 18.94 |
| 9.5 (T) | 60.8 | 19.35 |
| 10 (U) | 62.1 | 19.77 |
| 10.5 (V) | 63.4 | 20.18 |
| 11 (W) | 64.6 | 20.56 |
| 11.5 (X) | 65.9 | 20.98 |
| 12 (Y) | 67.2 | 21.39 |
| 12.5 (Z) | 68.5 | 21.80 |
| 13 (Z1) | 69.7 | 22.19 |
Inner Circumference: The measurement all the way around your finger. This is the number you get from the paper-strip method below, and the one most people should use.
Inner DIM: The measurement straight across the inside of a ring, edge to edge. Use this column if you already own a ring that fits and want to measure that instead of your finger.
For Rings with Sizes XS - L
| Size | Circumference (mm) | UK & Aus | US & Canada |
| XS | 52mm | L | 6 |
| S | 57mm | P | 8 |
| M | 62mm | T | 10 |
| L | 67mm | X | 12 |
Circumference: The measurement all the way around your finger.
Find your size in 3 easy steps:
1. Wrap a strip of paper around your finger, allowing for the size of your knuckle.
2. With a pen, mark the point on the paper where the two ends meet.
3. Measure the paper against the ruler in mm and compare it to the circumference in the above chart.
In between sizes? Always opt for the larger size.
Already own a ring that fits? Lay it flat, measure straight across the inside in mm, and match that to the Inner DIM column instead.
Printable Ring Sizer
Rather not use string? Print our ring sizer, cut out the strip, thread the narrow end through the slit and slide it onto your finger to read your size straight off it.
Download the Printable Ring Sizer (PDF)
Print at 100%. In your printer settings, set scaling to 100% or "actual size", not "fit to page". If it's scaled, every measurement on it will be wrong. The sheet has a line you lay a bank card along, so you can check it printed at the right size before you use it.
The strip reads in millimetres, the same as the chart above. All thirteen sizes are listed on the sheet too, so you can read your size without coming back to this page.
Onyx Rectangle Stone Signet Ring (Silver)
¥7,800
¥11,100
Onyx Rectangle Stone Signet Ring (Silver)