A wakizashi is a traditional Japanese short sword that typically measures between 12 to 24 inches (30 to 60 centimeters) in blade length. The exact size of a wakizashi can vary based on historical period, regional variations, and personal preferences of the swordsmith or owner.

In terms of overall length, a wakizashi typically ranges from around 20 to 30 inches (50 to 75 centimeters), including the handle and blade. The blade length itself usually falls within the aforementioned range of 12 to 24 inches (30 to 60 centimeters).

Compared to the longer katana, the wakizashi is shorter and more compact, making it a versatile sidearm or companion sword to the katana. It was commonly worn by samurai as a backup weapon or for close-quarters combat.

It's important to note that while there are general guidelines for the size of a wakizashi, variations can occur. Factors such as the historical period, intended use, and regional variations within Japan can influence the specific measurements of a wakizashi.

In summary, a wakizashi is a short sword that typically has a blade length ranging from 12 to 24 inches (30 to 60 centimeters) and an overall length of approximately 20 to 30 inches (50 to 75 centimeters). These measurements can vary based on historical period, regional variations, and individual preferences.