This silicone mold makes 1 3D diamond shape. It's made to pour resin into and let set, creating 3D votive candle holder.

Size: about 3.82 inch (97mm) in diameter, 3.39 inch (86mm) long

Quantity: 1 mold

Each mold is reusable and makes 1 shape at a time.
Since the cure time for resin can be 24 hours, you might consider stocking up on more than one so you can work on multiples at the same time.