The small one was a test, but I think it’s the right size… if the Bitcoin details will be more visible. And the big one can be a white canvas to paint on it 😁
Discussion
Perfect! If you make a silicone mold of it, you can cast as many blank canvases as you like.
For the small one, if you are going to make a silicone mold, you should 3D print at a place that offers SLA prints (Stereolithography).
SLA 3D printers use a laser to cure liquid resin into solid layers, resulting in significantly higher resolution and smoother surfaces compared to FDM (Fused Deposition Modeling) printers, which work by extruding plastic filaments.