The size is probably an M, but it runs large. [Brand Features] MUNSING shirts are characterized by their casual yet elegant design. They are perfect for everyday wear and can be worn in various situations. [Design and Style] This shirt features an eye-catching red and blue check pattern and a button-down collar design. It gives a simple yet stylish impression. [Comfort and Use] The long-sleeved design can be worn regardless of the season and is perfect for casual outfits. - Brand: MUNSING - Color: Red and blue check pattern - Sleeve length: Long sleeve - Design: Button-down - Back design: Simple design Thank you for looking.