The sizes displayed are jacket sizes. Pant sizes for 36-46 chest will be 6 inches smaller then the jacket size. Pants sizes for 48-52 will be 5 inches smaller, and 54-56 the pant sizes will be 4 inches smaller than the jacket size. Ex. Size 40 Regular Jacket comes with size 34 Waist Pants
You won't see any one but young men for the most part wearing these designer style slim fitting suits and that is what makes them so popular among the younger generation of men. Most grown men simply can't fit into a slim fit suit. It's sort of like a young man admission card that let's into club and leaves the older guys outside in the cold. Two piece slim fit suits are worn by tons of Celebs and you can dress like one as well.