Custom suits have their place as well. They are definitely more expensive, but the pay off is having a garment that is being built for every little nuance of your physiology. Bowlegged? The pants will be adjusted. Right arm longer then left? The right sleeve of your suit will be lengthened accordingly. Barrel chest? No problem. A tailor takes into consideration all the minutia of your person and translates that into the garment, allowing it to look like you were born with it on.