California Costumes mens Medieval Knight Adult-Sized Costume (pack of 1)

I'm 5'6/5'7ish, 175 pounds. Which size would fit me best?

Would the large/extra large size fit a 5/3 200 pound person?

Is the hood detachable?

Can the black material tunic be taken off from the front? I’m only interested in the chainmail and shoulder/arm armor part of it.