This is an Arena pullover. The size is O. Width (underarm to underarm) is approximately 63cm, and length is approximately 72cm. Please note that these measurements are approximate due to manual measurement. The lining is mesh. This is a very old item, so please refrain from purchasing if you are sensitive to used items. How about it, Arena fans? Please consider if you understand vintage clothing. I have other items for sale, so please take a look if you'd like.