1
Mia is the same age than her brother.
Mia is the same age as her brother.
When I had your age, I already had a job.
When I was your age, I already had a job.
Use the same age as, not the same age than. Use the verb be, not have, to talk about someone’s age.
2
He is more mature than other children with his same age.
He is more mature than other children his own age.
He is more mature than other children of the same age.
Use these patterns:
- someone my own age
- someone of the same age (as me)