First things first.
The length of a suit jacket is vital! The jacket should fall at mid to lower crotch level, dictating how balanced your upper body is to your lower body.
You always want the shoulders to lay perfectly flat, meaning that the shoulders seams of your jacket should end at the end of your shoulders.
You always want your shirt sleeve to peak through a 1/4 " to be safe .
Never fasten the bottom button
Remember guys a great suit doesn't look so great if it doesn't fit. For a more detailed look at the perfect suit, follow the guide below.