Ibex Merino Wool Baselayer Long Sleeved Shirt 3/4 Zip Black Gray and White 100% Merino Wool from New Zealand, Made in USA Size XL Approximate measurements 18" pit to pit 25.5" long I would say by the measurements it would be closer to a size Large, may have shrunk from washing. Good Pre-Owned condition, no rips, holes, or stains. Underwear Base Layer Thermal Exercise Fall Winter Spring Shirt Top Geometric Pattern design soft breathable