How similar in size we're each of your kids heads at birth?

when my first son was born, his head was measuring at 110% on the charts. (which resulted in a c section bc he got stuck my pelvic bone) They thought maybe it was hydrocephalus but after months of testing and watching it was determined he's just a big headed baby.

I'm trying for a vbac but worried that this baby will also have a big head and I'll have the same issue. my ob has said it's basically a wait and see situation since the ultrasound won't give a good measurement.

So how similar in size we're your kids heads?