There is a mark on the sleeve (see photos).
Measurements: - Under Arm to Under Arm: 24" - Top of Shoulder to Bottom: 30" Please compare measurements to something you own to ensure a proper fit.The product is a men's full zip jacket shirt made of polyester and spandex material. It comes in solid black color and size L. The shirt features UV-protection, long sleeves, lightweight, stretch, quick dry, pockets, and breathable fabric. It is designed with a beach and fish theme and is suitable for recreational activities such as lifeguarding, surfing, and other water sports. The brand is Tommy Bahama, and it is made in Thailand.