Long version:
“A man is a man, though he have never a cap to his crown” or
“...he have but a hose upon his head.” or
“...but a nose....”

Ye olde Eglifh proverbs that worked their way into early translations of Don Quixote (the original is entirely different.) I was taught the first two were a reference to Phyrigian caps, mortar boards &c.