Size problem

I, too, had an issue with this product in that there was no sizing chart. I ordered a "medium" (I have a 31 waist/44 chest), which is my correct size in every other shirt that I own. However, the cut on this tank is enormous and would actually cause a safety problem if I ever elected to wear it at the gym. Rather than send it back, I decided to just eat the cost rather than keep going back and forth with Amazon's 3rd party supplier trying to close in on the right size. Why not just supply consumers with a sizing chart??