A samurai sword, specifically referring to the katana, typically has a blade length that ranges between 23 to 28 inches (58 to 71 centimeters). The precise length can vary based on the specific design, era, and preferences of the swordsmith or owner.

The katana is characterized by its curved, single-edged blade, slender profile, and long grip. It is designed for versatile cutting techniques and balanced handling. The blade length of a katana is generally optimized to achieve a balance between cutting power, maneuverability, and overall sword dynamics.

It's worth noting that there are other types of swords used by samurai, such as the wakizashi (a shorter companion sword) and the tanto (a short dagger-like blade). These swords have shorter blade lengths compared to the katana. The wakizashi typically ranges between 12 to 24 inches (30 to 61 centimeters), while the tanto is usually under 12 inches (30 centimeters).

The precise measurements of samurai swords can vary based on individual swords, historical periods, regional preferences, and the personal tastes of sword owners or collectors. However, the general range for the blade length of a katana is around 23 to 28 inches (58 to 71 centimeters).

It's important to note that these measurements are approximate, and the specific dimensions can vary between individual swords due to the handmade nature of traditional Japanese swords and variations in historical examples or modern reproductions.