What constitutes a "regular T-shirt"? I have t-shirts that are quite thin, but I also have t-shirts that are quite thick. Both I would consider regular t-shir

What constitutes a "regular T-shirt"? I have t-shirts that are quite thin, but I also have t-shirts that are quite thick. Both I would consider regular t-shirts. At least for me, undershirts and blended material t-shirts tend to be on the thinner side while graphic t-shirts are usually heavier. I also have some t-shirts that are ridiculously thin that I think are mostly synthetics but there's no tag so I'm unsure.