There's a thing that happens when you mold and cast things, which is that every time you throw it into silicone and cast it in resin, you lose a little bit of volume, you lose a little bit of size.
型を取り鋳造する過程で こんな現象が起こります シリコンで型を取り 鋳造するたびに わずかですが 少しずつ体積と大きさが小さくなるのです