DD desperately needs some trousers for the colder weather, as she is skinny she tends to like leggings as they are soft around her waist, but they are not very warm. So I'd like to get her some soft cords, or coloured denim maybe rather than plain denim but denim would also do. She is 9 and her height is 135 so she falls above the usual age 8-9 band but if I go up to 10-11 they are falling off her. Any suggestions for good brands? Next do a slim fit but it looks like they are mainly school trousers. Thanks