Jersey was obtained at Chiba Lotte Marines Spring Training 2024 in Okinawa, Japan. Officially licensed from the Marines' merchandise booth.This is a hybrid T-shirt/jersey. It is made of a polyester-like jersey material with jersey texture but has no buttons and is cut like a T-shirt. Some may call it a shirsey. 

Sizing fits mostly true to American sizes. Slightly smaller, but not small enough to downsize to one size lower than your normal size. If large is normally tight on you, then this might be a bit more tight than you are used to.