Light Grey crew neck sweater (wool blend?) mens XL (fits like M or L)

Brand new and unworn (only tried on). This is one of those dropshipped sweaters from China that you find on random FB -advertised stores. No brand label and the material label is in Chinese, so I'm not sure what the material composition is. It feels like a wool-blend and certainly has the appearance of a wool-blend sweater, but I can't be sure. The fit: I am 5'11" 225 lbs with a broad chest/shoulders and this fits a bit snug on me. IMO this is more like a slim-fitting American L, or perhaps a larger M. Tough to tell, but definitely not like a modern American XL. See pics for measurements