Free 3D models · STL · 3DM · OBJ · GLB
Curb chain, free 3D model
Oval links twisted so each one lies flat against the next: the curb chain of men's necklaces and ID bracelets, already linked so it prints in one go and moves. Set the length and width, then download it. Free, with no account.

Building the 3D model…
Preview in
- 14k gold
- –
- 18k gold
- –
- Platinum
- –
STL: the metal only, ready for a slicer or a casting house. 3DM opens in Rhino and Matrix with metal and stones on their own layers. OBJ and GLB include the stones. All in real size.
The model
What you're downloading
- Links: 5 mm wide, of 0.96 mm round wire flattened a little top and bottom. Each link's ends are tilted 45° either way, its sides twisting smoothly between them, so the chain lies flat.
- Laid out: 20 inches (50.8 cm) as one closed loop lying flat, every link 0.22 mm clear of its neighbours.
- Clasp: none: the chain is one closed loop. Open one link to add a clasp and jump ring.
- Files: built in your browser when you click, exactly as you set it. STL, 3DM and OBJ are in millimetres (STL and 3DM Z-up); GLB is in metres, as the format requires.
Metal weight
How much does a gold curb chain weigh?
Measured from the 3D model, metal only, with everything else as first shown above. Real pieces vary a little with the alloy and finishing.
Weight by length
| Length | 10k gold | 14k gold | 18k gold | Platinum | Sterling silver |
|---|---|---|---|---|---|
| 7 in (17.8 cm) | 4.7 g | 5.3 g | 6.3 g | 8.6 g | 4.2 g |
| 8 in (20.3 cm) | 5.4 g | 6.1 g | 7.3 g | 10.0 g | 4.9 g |
| 18 in (45.7 cm) | 12.2 g | 13.7 g | 16.4 g | 22.4 g | 10.9 g |
| 20 in (50.8 cm) | 13.5 g | 15.2 g | 18.1 g | 24.8 g | 12.0 g |
| 22 in (55.9 cm) | 15.0 g | 17.0 g | 20.2 g | 27.7 g | 13.4 g |
| 24 in (61.0 cm) | 16.3 g | 18.4 g | 21.9 g | 30.1 g | 14.6 g |
What's the metal worth? 15 grams of 14k gold or 25 grams of platinum.
Questions
About this model
More tools
The rest of the bench.
3D
Free 3D jewelry viewer
Open a .3dm, .glb, .obj or .stl in your browser, set the metals and stones, turn it to any angle, and download the view.
Open tool →Photography
Jewelry photo checker
Score a product photo for lighting, focus, background and framing, and check it against Etsy, Shopify and Instagram size rules.
Open tool →Pricing
Jewelry pricing calculator
Price handmade jewelry to profit: materials, labor, fees, and target margin into retail, wholesale, and break-even.
Open tool →Pricing
Gold price calculator
Live gold value by karat and weight: melt value plus a realistic dealer payout.
Open tool →Pricing
Permanent jewelry pricing calculator
Price welded bracelets, anklets, and necklaces: chain, labor, and overhead into a per-inch price and margin.
Open tool →Pricing
Silver scrap calculator
Live silver melt value by fineness and weight: sterling, coin, and fine silver, plus a realistic scrap payout.
Open tool →Pricing
Platinum price calculator
Live platinum melt value by fineness and weight, from 950 and 900 marks, plus a realistic dealer payout.
Open tool →Identification
Hallmark decoder
Read the stamp inside a piece: 925, 750, 585, 417, platinum and plating marks.
Open tool →Reference
Ring size converter
Convert a ring size across US, UK, EU and mm, with a full chart and how to measure at home.
Open tool →














