Traditionally, companies were divided into large-cap, mid-cap, and small-cap.[citation needed][1] The terms mega-cap and micro-cap have also since come into common use,[5][6] and nano-cap is sometimes heard. Different numbers are used by different indexes;[7] there is no official definition of, or full consensus agreement about, the exact cutoff values. The cutoffs may be defined as percentiles rather than in nominal dollars.