Ebony Kurotani High-Grade Fine Wood Takohiki 330 Takohiki 11-inch Takohiki Japanese Knife Wooden Sheath Case with Copper Nails. Polished high-quality ebony, offering a gentle touch and a beautiful texture. Materials: Ebony, Brass Total Length: Approximately 353mm Insertion Opening: Approximately 30.8mm x 4.8mm Hole Depth: Approximately 335mm Width: Approximately 40mm (Please note that there may be an error of approximately +/-0.3mm due to amateur measurement.)