Singer Lizzie Marvelly, who was behind the #MyBodyMyTerms movement empowering women, said the campaign was completely disrespectful.
"As a representation of women - especially a sexual representation, it's really displaying quite a disturbing attitude," Marvelly said.
"I love supporting New Zealand brands and I think what [i love ugly] have done in building such a successful business and connecting with young people and New Zealand guys, is really awesome," she said.
"But I think it also puts them in a position where they do have a responsibility and a lot of respect in this space and they can choose to use that position to influence young men in positive ways or negatively."
"In NZ, where we have the worst sexual violence stats in the OECD, these images are frankly irresponsible. #iloveugly", Marvelly tweeted earlier.
In response, the company tweeted that it had had mixed reviews, but "if you're nervous about something, you're onto a good thing", prompting further backlash.
Newstalk ZB journalist Frances Cook disagreed.
Comedian Eli Matthewson also followed up to their statement.
The company hasn't explained its reasoning behind the campaign but wrote on its facebook page, "We tried our best to rework something that makes a lot of males a little uneasy and turn it into something the dubious could potentially see themselves wearing."
Not everyone disagreed with the campaign though, with several people tweeting their support for the brand and one of the rings sold out completely, and others sold out in some sizes on the company's website.