It can be a problem when you have a long torso because of they way they make shirts now. If I get a small, it's too short (5'11", short legs, long torso). If I get a medium, it is sometimes long enough but I feel like I'm going to flap away in the wind. Larges are always long enough but it's like they made a 2x and chopped off the bottom by accident. So unless I go get my shirts taken in (I do with all my dress shirts at this point) I have a hard time tucking them in because it just looks like shit and has so much extra fabric that it's uncomfortable with any pants that actually fit me.