also, even pants are cut differently for the body type, and the tailor can't change that. i.e. if he's a big guy and you're not, he probably has what's called an "executive" cut which makes the pleats lie down flat over his fat legs. If you're too thin, you'll have a nice pair of dressy parachute pants
If it's the other way around, you NEED an executive cut or your pleats will look stupid.