Dennis Robertson, SNP MSP for Aberdeenshire West, joined Dr Jane Morris, lead clinician in the Managed Clinical Network for Eating Disorders North Scotland, in making the call.
They asked the British Retail Consortium to advise fashion outlets to move away from size 10 mannequins to reflect that the average British woman has grown from size 12 to 16 in a decade.
Mr Robertson said: "I think it is important that a range of models and mannequins are used to celebrate the diversity in our society. It is equally important to remember how young people can be influenced by what they see in shop windows, magazines or adverts.
"Young people can be easily influenced from what they see in shop windows or fashion magazines, and these images can promote an unhealthy lifestyle, which can lead to eating disorders.
"It is not just the responsibility of medical professionals to help tackle the issue, the media and fashion industry must show some action and I hope the British Retail Consortium will take action and issue advice to the fashion industry."
Dr Jane Morris added: "Accepting a range of body images, while embracing individuality and diversity is likely to reduce the incidence of eating disorders and many other disorders characterised by low self-esteem and obsessionality.
"Any effort to widen public perception as to what constitutes attractiveness can only be healthy and civilised."