how long does the brain take to fully develop?

Question: how long does the brain take to fully develop?
- Keywords:
  brain,
  develop
Asked by juwaria to Sonia on 8 Nov 2018.
- Sonia Lenehan answered on 8 Nov 2018:
  
  Your brain and head have reached adult size by the time you are 16/18 but the brain doesn’t stop developing until you are in your 20’s!

Question: how long does the brain take to fully develop?