






LINE STRANA — METAL CORE
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Crafted to Order — Ships in 1–2 Weeks
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30-Day Returns
2-Year Structural Warranty
LINE STRANA — Metal Core Bracelet
Defined by a single line.
Part of the Line Collection, LINE STRANA — Metal Core integrates a precision-set metal axis into a solid forged carbon structure.
A single metallic line intersects the composite bar, introducing controlled contrast through material rather than ornament.
Available in Silver Core or Gold Core, each version refines the carbon surface with a defined linear detail — balanced, restrained, intentional.
Material contrast. Structural alignment. Engineered clarity.
Details
- Collection: Line Collection
- Material: Solid forged carbon fiber with precision-set metal core
- Core Options: Polished Silver or Polished Gold
- Bar Dimensions: 41 × 9.5 mm
- Finish: Hand-polished gloss
- Cord: Premium braided leather
- Closure: Precision magnetic clasp
- Origin: Manufactured entirely in-house
Features
- Machined from a single carbon block
- Real metal core — not plating
- High strength-to-weight ratio
- Hypoallergenic
- Each forged carbon pattern is one-of-one
Structural minimalism.
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.
Care Guide
Kartiel forged carbon jewelry is finished with an automotive-grade clear coat used on luxury cars, providing durability and long-lasting protection. Clean with a soft cloth and avoid harsh chemicals to maintain its finish.
Choose options







How It’s Made
Each piece is shaped, finished, and refined in-house from forged carbon composite and precious materials.

