My Ds has just turned 11 months old, he has always worn tesco own brand ultra dry nappies. He is currently in a size 5 and the last two mornings we have had leaking dirty nappies which has always been a sign they are getting too small.
They fit ok in the waist and thigh, it seems to be his big bottom that causes the trouble; there doesn't seem to be much space!
Does anyone know if some brands are bigger than others by any chance? Trying to avoid the expense of trying lots of different ones. Thanks.