Akademik

Женщине столько лет, на сколько она выглядит
A woman's age is of no importance; what matters is how old or young she looks
Cf:
A man is as old as he feels, and a woman as old as she looks (Am., Br.). woman is no older than she looks /, and a man than he feels/ (Am.)

Русско-английский словарь пословиц и поговорок. . 2013.