Vintage Arnold Palmer Men’s Long Sleeve Geometric Sweater Gray Size 50 Med/L ?

Vintage Arnold Palmer Men’s Long Sleeve Geometric Sweater Black Size 50. Not sure what size this would be equivalent to, maybe a medium or large…please see measurements to make sure it would fit you. Unsure of material content as the tag is worn off. Freshly washed and from smoke free home. Armpit to armpit: 23” Top to bottom: 28.5” Arm length: 24” Please see pictures for condition and don’t hesitate to message if you have questions.