On the world population review site four looks to be about median.
I think I lean, with the OP, to 6+ as being 'big' in today's world.
A wee note: those figures given in the link above are of "fertility rate" which I understand as being how many babies a woman has, not necessarily how many survive to produce babies themselves.
Escape pain courses; Livewell.
Things that (sometimes unreasonably) get on your nerves...hopefully lighthearted



