A wakizashi is a traditional Japanese short sword that is typically used as a companion to the longer katana. The blade length of a wakizashi is generally between 12 to 24 inches (30 to 61 centimeters).

The exact length of a wakizashi can vary based on the specific sword and individual preferences, but it is generally shorter than a katana. The shorter length of the wakizashi allows for greater maneuverability in close-quarters combat or indoor environments.

In historical usage, the wakizashi was often worn together with the katana by samurai as a secondary weapon or for self-defense. The combination of the longer katana and shorter wakizashi provided a versatile and balanced set of swords for different combat situations.

It's important to note that the measurements provided are approximate and can vary between individual wakizashi swords due to variations in historical examples, regional traditions, and personal tastes of sword owners or collectors.

In summary, the blade length of a wakizashi typically falls within the range of 12 to 24 inches (30 to 61 centimeters), making it shorter than a katana. The wakizashi serves as a companion sword to the katana and offers increased maneuverability in close-quarters combat or indoor environments.