Too further confuse the issue, and please keep in mind that this is all from memory, and since I retired I have tried to purge my hard drive of some of this info, in CA:

A dirk or dagger of any length, concealed upon the person is a felony.

A switchblade knife with a blade of over two inches in possession is a misdomeaner.

A locking blade knife with a blade over 4inches in length on any school grounds is a ??? Misd I think, but I just can't remember, and I no longer carry a penal code around with me...