Under construction


The bio was a Matoran unit of measurement. One bio was equal to approximately 4.5 feet or 1.37 meters.1 There were 1,000 bio in a kio.12


A Toa was 1.6 bio tall. There were 1,000 bio in 1 kio.3

For residents of Metru Nui, keeping a Rahi larger than .5 bio in a private residence was illegal by order of Turaga Dume.4

Toa averaged 1.6 bio in height (7.2 feet or 2.19 meters).12