Let's face it, the majority of men are not built like the mannequins we see at the clothing stores. That being sad, fit issues run rampant in this country, just look around and 11 out of the 10 guys you see need help. Hence the need for custom dress shirts and casual shirts. My first stent with custom clothing was as a child as my mother made all my clothes, if only I knew how cool I was. I just wanted to be like all the other kids as I got older and wear brand names. Until 6 years ago, I was just like the majority of guys out there with ill-fitting clothing. It's not the retailers fault, they are just trying to accommodate a range body types with a standard range of sizes in the most economical way possible. Let me give you an example of a general sizing chart and you will understand.
Taking measurements is the first thing that has to take place. We need the neck, shoulders, sleeve length, bicep, wrist, overarm, chest, shirt waist, shirt hips, and length. That gives me, or the person you are working with, a baseline for a real conversation on how you want your clothing to fit and what where you need to wear it. Some guys like things closer to the body then others and now you get to decide what works best for you. Depending on the client, I can have between 2-6 shirt profiles for him. For example:
Formal Dress Shirt - it will always be worn tucked in so we may make it a touch longer and he may want the cuff large enough to slide over a slim watch.
Casual button down - We would select a shirt length that allows him to wear it un-tucked without it looking like a shirt dress but still give the option of tucking in.
Casual short sleeve button down - I personally never wear them tucked in so I go a touch shorter with these and I like the ability to choose my sleeve length so it hits my bicep where I want.