New Zealand Association of Plastic Surgeons president Howard Klein is outraged by the competition.
He says any plastic surgeon who carries out the breast augmentation will be violating the association's code of conduct which prohibits giving away an operation as part of a raffle or competition.
"The augmentation is an operation that requires a formal plastic surgery consultation, consideration of alternatives and a full informed consent about all the risks inherent in the procedure," he said.
Klein is confident that no specialist plastic surgeon will participate in, or support the contest. Green MP and acting women's affairs spokeswoman Holly Walker said the party was against all forms of discrimination against women.
"It's an inappropriate thing to offer as a prize and our major concerns are that it's a major form of surgery that poses a considerable risk and we're concerned about the message it fundamentally gives about body image.
"It's pretty gross. It's a long shot to say it could support breast cancer survivors it's another justification people come up with after the fact to make them more legitimate," she said.
Le Prou defended the club 's giveaway and believed it stacked up legally. Calendar Girls' management had not decided which surgeon would carry out the procedure but said each winner of a heat could choose their own.
"The heats will all be different competitions including bikini, costume, amateur strip, popularity or best butt," Le Prou said.
Calendar Girls would pick up the bill for the 10 operations a combined worth of around $100,000.
So far the campaign, which targets women over 18, has attracted more than 200 applications.