This is a Pendant and you can produce by 3d print.
The length of this necklace is 3 cm and I can change it to your desired size and send it to you. So if you need help, I will be at your service.
With format: Obj _ Fbx _ Stl
Weight:4.2 g
X: 9.7mm
Y: 30 mm
Z: 10.3 mm