That's a good idea
I'm 5'9" around 190 lbs. with a sort of atheletic build and wear a 34x32 size jean.
The suit is perfect for my height, but it's just too tight in the legs (thighs) and chest/shoulders.... especially when I put on the back protector and chest guard.... so it kind of restricts my movement.
I think if I were 165 - 170 pounds or less, it would fit great.