Heidi Klum doesn’t think size zero exists.

The German supermodel has slammed the controversial US dress size – equivalent to a UK dress size 4 or a European size 32.

When asked her opinions about the size zero debate, Heidi said: “A size zero? I’ve never heard of that. That didn’t exist when I was growing up.”

“When did that start? What does it mean? It means a person is not there, no? It makes no sense.”

The dress size has caused a furore, with some models who can fit into zero clothes being branded dangerously underweight.

Models with a body mass index of less than 18.5, many of whom were size zero, were banned from Madrid fashion week in 2006.

Heidi, who raises three children with singer husband Seal, also recently denied she would consider having any plastic surgery.

Speaking at a 50th birthday party for children’s toy doll Barbie, 35-year-old Heidi said: “I hope that when I reach 50 I look as good as Barbie does, but I don’t think I’d go for surgery. I think I’m going to get older with wrinkles – a few of them here and there.”