So now I'm a little paranoid - at our 20 week scan (which actually happened at 21 weeks) the width of Bubs' head was 5.4cm

Is this massive? can anyone else remember their babies head width measurements at 20 weeks so that I can make a comparison?
I was just watching our morphology scan video last night. I can remember the head was around 5 cm but can't recall the exact measurement.

It's all fine!