Male performers are naturally taller stronger and heavier. Most ballerinas are between about 5 foot 3 inches and 5 foot 8 inches tall. For classical ballet the ideal is a light build with leg length half the body height and arm span about the same as height which should be between 53 and 55. 2kg 44lb weight fluctuation allowed for girls under 169cm 55ft tall. Its not just about weight. One company i know has their lead female principal dancer at a height of 184 cm.
Ultimately i want my dancers to look athletic healthy and muscular. Most ballet companys average height for a female is approximately 167cm. Its about extension proportion height all the genetic stuff. The ideal weight for a 174cm 57ft tall girl is 498kg 1098lb the ideal weight for a 168cm 55ft tall girl is 457kg 100lb the ideal weight for a 155cm 5ft tall girl is 37kg 815lb weight fluctuation allowed for girls over 170cm 55ft tall. Their height is also important. In many performances a ballerina has to be lifted by another performer.
Back in the 1970s dancers were super duper thin. In my opinion thats less important to our audience. With this height range weight is ideally anywhere between about 85 and 130 lbs and depends heavily on muscle and bone mass. The ideal height ranging from 5 feet 3 inches to 5 feet 8 inches. Theres nothing more exposing of your physique than classical ballet. However in europe some companies require females to be no taller than the traditional 165cm while others have a minimum height of 173cm.
Contemporary dance is a bit more lenient in regard to height and weight but cabaret prefers tall girls about 58 being the norm.