Free 3D models · STL · 3DM · OBJ · GLB
Princess cut engagement ring, free 3D model
A square princess cut with a prong over each corner, where it would otherwise chip, on a slim comfort-fit band. Choose the size, stone and band, then download it. Free, with no account.
Building the 3D model…
UK L½ · EU 52 · JP 11
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
- Centre stone: a 5.5 mm square princess cut (about 0.97 ct) with sharp corners.
- Setting: four round prongs, 0.8 mm thick, one over each corner, joined by two rails that follow the square. Each prong is notched to the girdle, and its tip beads over the crown.
- Band: comfort fit, 2.0 mm wide and 1.7 mm thick at the back, narrowing slightly toward the stone.
- Profile: the top of the setting sits 5.7 mm above the finger.
- Sizes: US 3 to 13 in half sizes, each built to its exact inside diameter (see the ring size converter for UK, EU and JP sizes).
- 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 princess cut ring 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 ring size
| Ring size | 10k gold | 14k gold | 18k gold | Platinum | Sterling silver |
|---|---|---|---|---|---|
| US 4 (14.9 mm) | 1.9 g | 2.2 g | 2.6 g | 3.5 g | 1.7 g |
| US 5 (15.7 mm) | 2.0 g | 2.3 g | 2.7 g | 3.7 g | 1.8 g |
| US 6 (16.5 mm) | 2.1 g | 2.4 g | 2.8 g | 3.9 g | 1.9 g |
| US 7 (17.3 mm) | 2.2 g | 2.5 g | 2.9 g | 4.0 g | 1.9 g |
| US 8 (18.1 mm) | 2.3 g | 2.5 g | 3.0 g | 4.2 g | 2.0 g |
| US 9 (19.0 mm) | 2.3 g | 2.7 g | 3.2 g | 4.3 g | 2.1 g |
| US 10 (19.8 mm) | 2.4 g | 2.7 g | 3.3 g | 4.5 g | 2.2 g |
What's the metal worth? 2 grams of 14k gold, 3 grams of 18k gold or 4 grams of platinum.
Questions
About this model
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Hallmark decoder
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Ring size converter
Convert a ring size across US, UK, EU and mm, with a full chart and how to measure at home.
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