Adidas white button-down polo shirt. The fabric feels like sportswear, is smooth, and doesn't wrinkle easily. The neck isn't quite a mock neck, so I don't think it can be worn at a formal golf course. My husband, who usually wears size M, said it was a perfect fit. Worn only once at the driving range. I forgot the retail price, but it was 8279 yen on Rakuten. Size M Flat measurements Length: 69cm Shoulder width: 45cm Width: 51cm - Brand: Adidas - Color: White - Design: Button-down polo shirt - Size: M (AU/NZ) Thank you for looking.