You may be able to look it up, but if she said everything is good, I'd trust that and enjoy the u/s pictures you received. Or, you can call the office back and ask.
this is probably something you could google or speak with your midwife about. however, if your midwife didn't say anything about the measurements, i think it's safe to assume that your LO's measurements are within that average range.
Re: Anatomy scan measurements -