In a Monarch Interview a few years back (hides her wrinkles), one of the applicants feinted in the group interview as she hadn't eaten for a week through fear of their scales being different to hers at home.
Emirates told me to lose 4 pounds before the second interview.
Because of course, only slim women can deal effectively with awkward passengers, emergencies, medical issues, afraid passengers, etc.
I've known of women who are so slight, they cannot pull a trolley!
Some of these airlines are a lifejacket short of a demo kit!!
The fact is, providing a crew member is relatively fit, can use a crew seat and fit through an exit, there is no legal rule to suggest they cannot do the job.
Its image many airlines are worried about. But then many airlines over the past few years have come to realise that over weight and curvier crew can do the job just as well or better than the size 10s in the business.
I have done the job as both a size 10 through to an 18. Its no different. My first airline never weighed me, or my colleagues. They liked to employ their crew because they were warm and approachable. It was certainly a positive point that came out on feedback questionnaires.