I obtained this item overseas. The size is approximately a Japanese size 23.5, but I will measure it precisely. If you are interested, please let me know in the comments. The material is unknown. Although it is new and unused, please understand that it is a pre-owned item stored at home. I look forward to your purchase. For delivery, I plan to use either the Rakuraku Mercari delivery service (Takkyubin) or the Yu-Yu Mercari delivery service (Yu-Pack) in a 60-size box, or the Rakuraku Mercari delivery service (Takkyubin) in an 80-size box. Color: Black系 (Black-based)