The size of guppies vary , but males are typically 1.5-3 .5 centimetres ( 0.6-1 .4 in ) long , while females are 3-6 centimetres ( 1.2-2 .4 in ) long .
It is a small member of the Poeciliidae family ( females 4-6 centimetres ( 1.6-2 .4 in ) long , males 2.5-3 .5 centimetres ( 1.0-1 .4 in ) long ) and like all other members of the family , is live-bearing .