To help compare different orders of magnitude this page lists lengths between 10 and 100 kilometres (10⁴ to 10⁵ metres). The myriametre (sometimes also spelled myriameter, myriometre and myriometer) (10,000 metres) is a deprecated unit name; the decimal metric prefix myria- (sometimes also written as myrio-) is obsolete and not included among the prefixes when the International System of Units was introduced in 1960.