There are two types of wooden swords used. First, thebokken or bokuto: a solid wooden sword. The bokuto is used for basics and forms practice (kata).
Second, the shinai, is made up of four bamboo staves and leather. [shinai assembly 1 | 2] The shinai is used for full contact sparring practice. Adult men use a size 39 shinai, while women use a size 38 shinai.