: The jacket should fall around the crotch level of your pants, just covering your backside.
: You should be able to slide a hand inside your buttoned jacket comfortably. If the lapels gape or the fabric forms an "X" shape (whiskering) at the button, it is too tight. Night School Suit Fitting.mp4
: Ideally, a quarter to half an inch of your shirt cuff should be visible below the jacket sleeve. : The jacket should fall around the crotch
: Pants should sit at your natural waist. The hem should ideally have "no break" (barely touching the shoe) or a "slight break" for a clean, professional look. The Armoury's Guide to How A Suit Should Fit : Ideally, a quarter to half an inch
: The seam should align perfectly with the end of your natural shoulder. If it overhangs or bunches, the jacket is the wrong size.
If you are looking for actual advice on what makes a suit fit well (as seen in style guides rather than comedy films), experts highlight several critical points: