"Ella tiene treinta y siete años." (Pronounced "aya tee-en-ay trayn-ta ee see-et-ay a-nyos.")
The expression to say how old you are or a material object is in Spanish is "tener ____ años".If you literally want to translate "years old" into Spanish, this would be "años de vejez", but this is nonsense to any Spanish speaker.
i am 41 years old
cien años
años de edad
You can say "Tengo cinco años".
Tienes quince años.
Tiene veinticinco años.
Tengo diezisiete anos.
Tienes deiz años.
Mis amigos tienen doce años. This is literally "My friends have 12 years", but is normally translated as "My friends are 12 years old."
In Spanish, you would say "Tengo once años." This translates directly to "I have eleven years," which is the common way to express age in Spanish.
It means years. For example if you want to say 20 years old you say 20 años.