It a question that has no answer really. Some women have bigger babies each time and other don't. Some women have all their babies that are roughly the same weight, sometimes if the next is a boy it could be bigger, but if your next is a girl they could be smaller. If you go early or go late that can affect bubs size. So see how you can't answer? There are too many variables. My first was a smidge bigger than yours and my next was a girl who was smaller, but my next two were significantly bigger each time.

And I think your physio is talking out their arse quite frankly. There could have been a lot of reasons why you were pushing for long and tore as bad as you did and not many of those reasons would have anything to do with the size of your baby.