The length of a samurai sword, known as a katana, typically falls within the range of 2.5 to 3 shaku. In traditional Japanese measurement, 1 shaku is roughly equivalent to 30.3 centimeters or 11.9 inches. Therefore, a katana can be approximately 75 to 90 centimeters (29.5 to 35.4 inches) long.

The specific length of a katana can vary based on factors such as the time period, the swordsmith, and the intended use or style of the sword. Additionally, there are variations of Japanese swords, such as shorter swords like wakizashi and longer swords like nodachi, that exist within the family of samurai swords. However, the katana is the most commonly recognized and iconic type of samurai sword.

It's important to note that the length of a sword is measured from the tip of the blade (kissaki) to the base of the handle (tsuka). The length of the blade itself, excluding the handle, can be slightly shorter than the overall length of the katana.

The design and length of the katana were carefully considered to optimize its balance, maneuverability, and cutting effectiveness. The proportions and dimensions of a well-crafted katana were based on centuries of refinement and the specific requirements of the samurai warrior.