I have been mulling this concept over and determined to open it to debate. I have a partially serrated blade that, from tip to hilt, is around 20 inches, maybe longer. I do not have it on me, so I can't get an exact size. I tend to think about this as a knife, but I have visible further sized blades be known as swords (handmade wakizashi swords). Is the whole sword/knife aspect determined through size, or Is there a extraordinary factor to keep in mind?