FORM RING-Lume
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FORM — Lume Core Ring
Pure form. Integrated light.
The FORM Lume Core Ring pairs solid forged carbon fiber with a luminous interior core, creating contrast through structure rather than decoration.
The exterior remains clean and uninterrupted — deep black carbon with a natural marble pattern formed during forging. In low light, the inner core emits a sustained glow when charged by sunlight or UV.
The luminous compound is formulated and cast in-house, integrated directly into the ring rather than applied as a surface element.
Each piece is machined from a solid forged carbon shell and finished entirely in-house. Every ring carries a distinct pattern — no two are identical.
Minimal surface. Controlled illumination. Engineered restraint.
Details
- Material: Solid forged carbon exterior with integrated strontium aluminate luminous core
- Width: 8.5 mm
- Finish: Hand-polished gloss
- Interior: Comfort-fit ergonomic curve with luminous core
- Origin: Made entirely in-house
Features
- Machined from a single forged carbon shell
- Integrated luminous interior — not paint or coating
- Hours of glow per charge
- Charges with sunlight or UV light
- High strength-to-weight ratio
- Ultra-lightweight and durable
- Hypoallergenic
- Each forged marble pattern is one-of-one
Ring Size Guide
Ring Size Guide
| US Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| 6 | 16.5 | 52.0 |
| 7 | 17.3 | 54.5 |
| 8 | 18.2 | 57.0 |
| 9 | 18.9 | 59.5 |
| 10 | 19.8 | 62.1 |
| 11 | 20.6 | 64.6 |
| 12 | 21.4 | 67.2 |
| 13 | 22.2 | 69.7 |
| 14 | 23.0 | 72.3 |
How to Measure at Home
Method 1 — Use an existing ring
- Measure the inner diameter of a ring that fits you
- Match the measurement to the chart above
Method 2 — String or paper method
- Wrap a string or strip of paper around your finger
- Mark where the ends meet
- Measure the length in millimeters
- Match to the circumference column
Tip: Measure at the end of the day when fingers are slightly larger for the most accurate fit.
Bracelet Sizing
SIZING GUIDE
Engineered fit starts with accurate measurement. Follow the steps below to select the correct size.
BRACELET SIZING
How to Measure Your Wrist
- Measure your wrist just above the wrist bone.
- Use a flexible measuring tape. If you don’t have one, use a string and measure it against a ruler.
- Keep it snug — not loose, not tight.
- Do not add extra space. We include a comfort allowance in the bracelet design.
Bracelet Size Chart
| Size | Wrist Circumference (cm) | Wrist Circumference (in) |
|---|---|---|
| XS | 14.5 – 16 cm | 5.7 – 6.3 in |
| S | 16 – 17 cm | 6.3 – 6.7 in |
| M | 17 – 18.5 cm | 6.7 – 7.3 in |
| L | 18.5 – 20 cm | 7.3 – 7.9 in |
| XL | 20 – 21.5 cm | 7.9 – 8.5 in |
Between sizes? Choose the larger size for a looser fit.
Choose options