Jo size

Jo has a fixed length regardless of user height. A Jo is measured in the old Japanese measurements of shaku (30.3 cm), sun (3.03 cm) and bu (0.303 cm). The exact measurement should be 4 shaku, 2 sun, 1 bu which equates to 127.563 cm. The diameter should be 8 bu which equates to 2.42 cm.