My ds is starting reception class in September and I have started to get his uniform ready however I have been to asda twice so far to exchange trousers! He is a chubby little guy and quite short but the 3-4 size is too tight around the waist but perfect length wise. I exchanged these for a 4-5 which are much too long and also too tight around the waist. Anyone know where they sell school trousers with a stretchy waist? Do asda? Couldn't have a proper look as was in a rush. Thanks