Frank J. Wilstach, comp. A Dictionary of Similes. 1916.

Bald

Bald as a billiard ball.
—Anonymous

Bald as an egg.
—Anonymous

Bald, as ’twere a scalp, reft of its hairs.
—Arabian Nights

His head was as bald as the palm of your hand.
—Richard Harris Barham

Bald as a Greek monk.
—Richard Hovey

Bald as is the winter tree.
—William Morris

Bald as a coot.
—English Proverb

Bald as a cannon ball.
—William Makepeace Thackeray