I ordered one pack of the white ones and decided to order 1 more white, plus 2 packs of the black/grey ones. I'm 6'4, 210 lbs so finding the right fitting shirts/undershirts is always tough. I seem to always fit right in the middle between a large or XL, I ordered these in large and they fit perfectly, even after several washes. Very happy with this purchase, will come here and buy more when needed.