This product is made from high-quality moso bamboo, carefully selected and harvested from the fertile soil of the Hakone-Seiroku region in Shizuoka. Total Length: Approximately 18.5cm Blade Length: Approximately 12cm Blade Width: Approximately 8.5mm (tip) to approximately 19mm (base) Handle Width: Approximately 32cm Blade: Double-edged As it is a double-edged type, it can be used on both sides and by both right- and left-handed users. It is mainly intended for opening envelopes or when you want to cut a single sheet of paper in half. Please note that this is a handmade item, so there may be some imperfections. The natural bamboo material and flavor have been preserved, and no finishing paint or oil removal has been applied. Photo ④ shows the included blade sharpening set. Please use it to adjust the sharpness. As shown in Photo ⑤, wrap sandpaper around a bamboo stick and sharpen the blade at the appropriate angle. If the blade becomes too thin, apply sandpaper at a right angle to the edge and lightly sharpen it.