His old ones are too small, and the new ones I bought online are a size too big. I've ordered ones that should fit, but they haven't arrived yet.
He is desperate to wear the too-big ones. They fit round the waist (adjustable buttons) but are too long. I said he could go to school in them just for a day or two till the new ones arrive (with them folded up at the hem, twice). My mum, who was taking him, was aghast and insisted he change back to the old ones.
So - I am a bit annoyed, but perhaps AIBU and it is indeed shocking to send a child to school in too-long trousers. He's 5, if that affects things.