article said:
I am fascinated by how we have supersized our society. A large T-shirt in 1970 seems really small now. Everybody was skinny, and shirts were tight back then. The garment industry has changed the sizes almost every 10 years. The shirts are wider and longer now.
Shirt sizes vary a great deal between brands. Now, some brand differences are because of the culture of the customer -- some styles are intentionally designed to be long and baggy, where others are intentionally designed to be short and tight. A medium in one won't have the same dimensions as a medium in the other -- by intentional design because of different style.
Some people want a particular shirt because they like it individually, but they want it to fit like a shirt of a different style, so they have to know to choose a different size than what the shirt was designed for. For example, if a particular shirt fits you as a medium, but you want to wear it for exercising, you may want a small so it fits tighter and doesn't flow around and get in the way. (A shirt specifically designed for exercise may already be sized medium to fit a medium person with its purpose in mind.) Or maybe you want to wear it with loose, baggy jeans, so you want a large to it matches the pants style. (A shirt specifically designed for baggy style may already be sized medium to fit a medium purpose.)
But then, there is also some vast differences between brands that serve the same customer base. This gets frustrating. For instance,
I found some "performance" shirts that varied a ridiculous amount -- a medium was loose, a large was tight. Same shirt style, but the brands didn't agree on a sizing.
As for the "we have supersized our society" comment, I dislike using the "supersize" term. I think it's too much. But I will say that of the t-shirts I've sold, large and x-large are definitely the most common sizes. Personally, I wear medium comfortably, but I don't mind a shirt to be form fitting on me. Some people, possibly even with my body size, just feel more comfortable with a little extra room in their t-shirts.
Bullgrit