New to PA laws, so please excuse my ignorance. I'm interested in an EDC knife. It is my understanding that as long as I have a legal knife, I can carry it open or concealed, as long as it's for legal purposes. I wasn't sure how the concealed aspect worked since PA is an open carry state. If concealed, does that mean I need a CCW permit, or does this not apply to knives and only to firearms?

And there is no limit or restriction on blade size?

I know, I know...I brought a knife question to a gun forum...