People who have slim children and trouble finding trousers that fit and that you don't have to pull as tight as the adjustable waist allows, I have found something -
Vertbaudet does Full, Medium and Narrow fit trousers for both boys and girls. My tall, very slim boy finally has a pair that fits like a glove.
www.vertbaudet.co.uk/girls-bottoms-jeans-trousers-perfect-fit.htm
www.vertbaudet.co.uk/boys-bottoms-jeans-trousers-perfect-fit.htm