I know I am probably BU and he should be allowed to wear what he wants.
He wears a suit for work that he looks good in but he is getting too big for his old jeans and hasn't bought new ones. Most of the old ones are size 40 waist and he's more like a 50 waist now so they end up low slung under the belly. They constantly creep lower even with a belt and he is often showing off his pants like a teenager and the bottoms get all ragged from standing on them. He has to pull them up all the time and if his hands are not free he is in real danger of the jeans falling all the way down. As well as that he has favourite T-shirts that don't meet the jeans any more so there's bare belly overhang. It's making me cringe but if I mention it he says I am overreacting.
I have tried buying new jeans myself but can't find any big enough in normal shops to go around his waist. If he wanted to buy from the 'big and tall' type mens shops he would have to go and get measured, which he won't do because he thinks his old jeans still fit. Arrghh! AIBU? Should I just let him wear the old stuff if he wants to?