In the television series "The Walking Dead," the exact length of Michonne's katana is not explicitly specified. However, like traditional katanas, it is typically depicted as a long sword with a curved blade and a handle long enough for two-handed use.

A standard katana usually has a blade length ranging from around 60 to 73 centimeters (24 to 29 inches). The handle, or tsuka, is typically around 25 to 30 centimeters (10 to 12 inches) long. Overall, a katana's total length is typically between 85 to 100 centimeters (33 to 39 inches).

Since the television series does not provide specific measurements for Michonne's katana, the length of her sword may vary slightly depending on the specific prop used in the show or the artistic interpretation of the production team.