Should there be bigger sizes for clothes?

It's not a very demanding issue but I wish there were bigger sizes for the shirts,hoodies, etc. I know that if i want to buy a shirt (specifically the Astronautilus t-shirt) i'd have to lose around 40lbs and even though this might be a good motivator it would take me a long time since i don't have much free time. I just think that a majority of the league fan-base is bigger then a 2xl and it would more then likely increase the amount of sales on clothing articles. I'm just hoping that this will be popular enough to make some change.