Ebony Kurotani High-Grade Fine Wood Takohiki 300 Takohiki Shaku Japanese Knife Wooden Sheath Case with Sheath and Copper Nails. Polished high-quality ebony, offering a gentle touch and a beautiful texture. Materials: Ebony, Brass Total Length: Approximately 323mm Insertion Opening: Approximately 30.8mm x 4.8mm Hole Depth: Approximately 305mm Width: Approximately 40mm (Please note that there may be an error of +/- 0.3mm due to amateur measurement.)