A very Nice suit!...Perfect!
A couple of things to bear on mind regarding your size selection:
1-be aware this suit belongs to the Kenneth Cole "slim" line collection so is intented to fit tight to your body.  I would advice to buy two numbers bigger than your actual chest measurement (...don't know your actual chest measurements?--google it!), for example: if you are 38 (my case) you might want to buy a size 40 wich will fit perfectly 'close' to your body, or you might want to choose a 42 if you want some more 'room'.
2-suits sizes are 2 measurements: your chest(40, 42, 44....), and your tall (short:5'4"-5'6"; regular: 5'7"-5'11"; long:6'0"-6'3"), so for me a full size selection was 40L (my chest being 38 and my tall 6'1") and it fits great on me!!!