My DD 3 months is a small person weighed 5lb 4 at birth and steadfastly growing along 0.4th centile since. We have a lot of conversations with interfering old biddies on buses like this:
IOB: Ahh what a tiny baby how old is she?
me: 3 months
IOB: Gosh really she's very small
me Uh huh
but yesterday someone went one further
IOB: Did you smoke in your pregnancy?
me: speechless at the rudeness.
How I wish I had said not unless you count the crack!