Color: Blue系 (Blue-based) About the product: The length is measured with the current length of the shoulder straps, so the length will increase if you lengthen the shoulder straps. *Measured flat by a layman. Please check the details such as size and condition in the description sheet on the second photo and all photos. Please forgive any slight errors. Material: Please refer to the photos. If you have any questions, please feel free to ask!