Doutzen Kroes doesn't think designers should hire pre-pubescent models.

The Victoria's Secret Angel is shocked by how young some of the girls walking the runway are, and says the sample clothing sizes are so small and unrealistically proportioned that many professional models can't wear them.

She told The Telegraph newspaper: ''I'm not a sample size at all. 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. But I joke about it and say 'What 13-year-old girl is wearing this?'

''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.''

While the blonde bombshell - who has a two-year-old son, Phyllon, with her husband Sunnery James - is a fan of using social media to connect with her fans, Doutzen is worried she could be responsible for instilling body insecurities in teenagers.

She mused: ''[Social media is] a tool you have to use. I enjoy reading what people have to say and answering... [but] 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.

''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.''