as bald as a cue ball
US /æz bɔld æz ə kju bɔl/
UK /æz bɔld æz ə kju bɔl/

1.
completely bald; having no hair on one's head
:
•
After years of losing hair, he was finally as bald as a cue ball.
•
My uncle has been as bald as a cue ball since his twenties.