As a manufacturer of performance Sport clothing JOMA Sport uses a number of different fit and cut characteristics. They all have an important purpose but they also add a level of complexity to the size selection decision.
As you move between the Regular, Semi Fitted and the Semi Fitted Pro, the basic body dimensions do stay the same (length, neck size etc.) but the width is going to change dramatically. If you want to change the fit to suit your preference then you will need to adjust you size selection up for a more relaxed fit or down if you want a Regular Fit product to a bit tighter. If you are doing this please also remember that the length and neck size could become an issue.
The Fitted and Compression products are designed to be skin tight. Swapping sizes to find a looser fit isn’t recommended so please only purchase these products if you are happy with a fully fitted product.