Miraan Men's Long Sleeve Casual Dark-blue Denim Shirt X-Large Dark Blue

Usually wear a large, but saw they run small, so ordered an XL. Tried fitting it, and arms were skin tight and was 3 inches short of buttoning around the waist/chest. I'm 6'0 200 and don't believe a 4x would fit, even if I fasted for a month. It's size so far off, I thought it might be a gag