21 weeks pregnant. Percentile

Kaylie • 23yrs old. Prothomin gene mutation factor 2. PCOS. Rainbow baby #2 due 4-20-2020. Angel baby Loxley River 9-2-17. My Rainbow AviciiLynn Monroe 12-7-15. Angel baby Dakota Raine 11-3-14

After my ultrasound I was told my baby is messuring in the 95th percentile. I'm kinda wondering how much bigger than normal is that?.