X-RAY Jeans Hunter Green T- Shirt Mens Says 3XL, fits like XL

Rounded neck hunter green T- Shirt w/ 3 button neck. Measures 23.5” armpit to armpit so it’s an XL, NOT a 3X. I think this is a mistagged shirt for size as it didn’t shrink when washed - 95% cotton, 5% Spandex