Hello, I'm Conan, a member of the team. I also watch other cartoons. Glad to answer your question _

There is no detailed information about the overall size of this knife. ...

In fact, in One Piece, the knife is not as important as death, and there will be detailed information.

The understanding of knife is limited to the supreme sharp knife, big sharp knife and so on.

For example, the word "leading knife" like "and knife" in Sauron has only some information, but the matching knife has no information.