I have a bonny chubby 4 month old baby, 19 pounds, but I can't find any trousers/shorts to fit his tummy! He has a large tummy, like me, M&S not good, not Next, the bigger sizes eg: 12-18 months are too small, yes can you beleive it?! DS1 was like this as a babe, not he's a 5 year old talk string bean!