I have up for sale Carolina Panthers NFL The Nike T-Shirt Dri-Fit new without tags.  No Size inside:  Under arm to under arm approx. 20” across.  Back of the neck to the bottom hem approx. 26” long.  RN136380, 100% Polyester.  Excellent Condition, no without tags.  ****Please see measurements; might be a size Mens Medium or Large by my measurements.