Design Tsuba (Sword Guard) for Kendo Shinai (Bamboo Sword) - "Dragon" I have kept this in storage without ever using it after purchase. This product was created using a hand-drawn illustration by a designer. Therefore, it is one of a kind. I think you can use both sides during practice and matches. Inner Diameter: Approximately 34mm Diameter: Approximately 88mm As the item is not currently in hand, it will take some time to ship. (※ The longest shipping date selectable is 4-7 days, but it may take longer.) Thank you.