This is a cotton-blend white long-sleeved shirt from AOKI LES MUES. It has a regular collar and can be worn both formally and casually. The fabric has a lovely subtle argyle pattern. LES MUES, meaning "to be reborn," is a brand that pursues both fashion and functionality. - Color: White - Design: Skipper, Argyle pattern - Material: Cotton blend - Size: 11 (Japanese size) - Accessories: 2 replacement buttons Thank you for viewing. I have worn this shirt a few times over three seasons. It has been stored in a dark place as I haven't had the opportunity to wear it. I have included a photo of the collar, so please check it before considering a purchase. ● Flat measurements: Shoulder width: 40cm Body width: 48cm Length: 65cm Sleeve length: 56cm ※ Please note that there may be slight variations due to amateur measurements. ● Material: Cotton 75% Polyester 25% Piping: Polyester 100% I appreciate your understanding of home storage. There are no pets or smokers in the household.