Ensure that when you are standing in the jacket, a 1/4 inch of shirt collar is exposed above the suit collar. The jacket will ride up when you sit, and if the collar is too big, your shirt collar will disappear under it.
2
Measure the jacket sleeves so a 1/2 inch of your shirt cuff is exposed.
3
Look at the shoulder pads to make sure they are gently sloping downward. If you have big shoulders, you should have smaller shoulder pads than the average man.
4
Raise your arms over your head while wearing the jacket. If it rises up enough that it looks comical, you need to have the armholes adjusted.
5
Use a mirror to make sure that your jacket isn't too short. It should just cover the top of your rear end.
6
Check your pants. They should sit at your waist, not your hips. They should not be roomy in the crotch, but they should not be snug either.
7
Adjust the width of the pant legs so they hang without any bulges. Muscular men may need to have their pants specially made.
8
Hem the pant legs so they rest on the tops of the shoes with a small break in the crease.