My little man will be 5 months next week can almost sit unassisted and we are in 3
Size 2 and can't sit unassisted yet.
Quoting Supafly★:" Size 4 and can sit unassisted for like, a second. He's still wobbly. "
wobbly, lol....the perfect word for DS
My LO is 5 months and in a size 2 diaper and she sits up and will pull herself up into a sitting position.