The same was true of 95 per cent of the parents of overweight children and 62 per cent of the parents of obese children.
Parents of normal weight children tended to think their child was one sketch slimmer than their Body Mass Index (BMI) indicated and parents of obese children often chose sketches that were three slimmer.
Sauer said: "It's estimated that 10 per cent of children in The Netherlands are overweight, compared with 20 per cent in the USA. However, public perception of what is a normal weight has shifted upwards because more people are overweight or obese.
"Overweight children are very likely to become overweight teenagers and adults, so intervening when they are aged between three and five could prevent weight problems later in life.
"It is vital that parents are aware of their children's weight if we are to prevent them becoming obese in later life.
"The fact that the parents in our study perceived their children to be lighter than their BMI indicated is cause for concern."
Sauer concluded: "Our findings point to the need for health education programmes that encourage parents to recognise what is a normal healthy weight for their children and work with health professionals to tackle any weight problems."
The study has been published in the February issue of Acta Paediatrica.
Source-ANI
RAS