When it comes to the fit of the product, the only thing you need to remember is your preference of the fit.
All our items are REGULAR fit - which means that it will follow a little looser on your body. For example, if you opt for 42", the finished chest of the garment is 43", thus it is REGULAR fit.
If you want a little more of a SLIM fit, opt for 40" (which is finished at 41") on the chest.
On a more practical note, if you are worried about your physique and you want a loose fit, just go for your regular shirt size. If it is 42", opt for 42"
If you have any more questions regarding the fit of the product, please shoot us an email on email@example.com, we will help you out :)