There is no doubt regarding the sharpness of the ninja swords. They are as sharp as the razor meaning that their handling demands extreme care. The experienced sword collectors are well versed with the ninja swords and know how to handle the respective swords. The novices are not that knowledgeable about it and they need to take extra care regarding their handling. Hence it should be kept in mind in order to avoid any unfortunate mishaps.
Those who are a fan of the ninja era and regard the ninja swords as a collectible item are very fond of the Full Tang Ninja Swords that come with Dual Rainbow Blade Sheath which have been much famous. It is an excellent copy of the swords from earlier centuries and is most definitely a very nice addition to their sword collection. They are available in both large and small sizes. The larger ones are almost a foot and a half in length and the short swords are mostly around one foot in length.