la sua stessa età

the same age as him/her

→ il
phrase Rare #45,053
the same age as him/her “Sua” can also mean “your” in formal address; its meaning depends on who it refers to.
IT: Mia sorella ha la sua stessa età.
EN: My sister is the same age as him.

Lui ha circa la sua stessa età.

He's about the same age as her.

Avevo la sua stessa età.

I was the same age as him.

Ho la sua stessa età.

I’m the same age as him/her.

Ha la sua stessa età.

He/She is the same age as him/her.