Speaking to The Telegraph, she said: "I feel I'm such a big part of that insecurity that some girls might have because of my job, that girls think they have to be that picture."
She added: "And even boys, they think that that picture exists and it's so frustrating because I don't look like that picture - I wake up not looking like that picture."
Kroes, who has been a Victoria's Secret Angel since 2008, also explained that despite working hard to maintain her enviable figure, sometimes even she has trouble fitting into designer clothes.
"I'm not a sample size at all," she said.
The model also revealed that she has a real problem with designers who use pre-pubescent models to walk in their shows.
She explained: "At some shows I know they have been using very young girls who have not gone into the change of the body yet - no hips, no boobs. I'm 28 and I've had a baby. I have a woman's body, and once in a while you run into the fact that things are not fitting the way they should be."
She added: "If they think I'm too fat, I'd rather not do the job - because I am super-healthy and fit and I'm so happy the way I am."