The length of a cavalry saber can vary depending on the specific design, historical period, and region. However, the typical length of a cavalry saber ranges from around 32 inches (81 cm) to 40 inches (102 cm) or even longer.

Cavalry sabers were designed to be used from horseback, providing the cavalry troops with a weapon that had reach and could be effectively wielded in mounted combat. The length of the saber allowed for powerful slashing and cutting attacks against opponents.

It's worth noting that different countries and time periods had their own variations of cavalry sabers, and the precise measurements could differ. For example, the U.S. Model 1860 Light Cavalry Saber had a blade length of approximately 35 inches (89 cm), while the British 1796 Light Cavalry Saber had a blade length of around 33 inches (84 cm).

Overall, cavalry sabers were longer than many other types of swords to accommodate the needs of mounted combat, where the reach and striking power were important factors.