This is a UNIQLO linen-blend shirt. I purchased three of these shirts to use as a school uniform for middle school, and this one is unused. The other two shirts are also listed on other pages. The shirts from the uniform manufacturer were made of polyester, which caused severe heat rash, so I looked for similar open-collar shirts and used these as a substitute. 53% linen, 47% cotton The sizes of each shirt are unknown. I believe I purchased two in size L and one in size M at the time. Please refer to the flat measurements below. Even within the same size, there may be variations in size and feel due to the linen blend material and differences in frequency of use and washing. Please be sure to check the details on each page before purchasing. Shoulder width: 46cm Sleeve length: 25cm Body width: 57cm Length: 76cm Please note that there may be slight errors due to amateur measurements. Although this item is unused, it has been handled by a person. Please purchase only if you understand that it is a home-stored item. Please refrain from purchasing if you are concerned about minor details. The item will be compressed for packaging, so please be aware of creases. We look forward to your purchase if you understand. Color: White系 (White-based)