Cuban heel

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A broad heel of moderate height with a slightly tapered back and straight front, used in shoes and some boots.
• noun A reinforced heel on a stocking.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A relatively low-style of high heel shoes, characterised by a slightly tapered back and a straight front
• noun A type of heel used for men's boots similar to the heel on cowboy boots
• noun Women's sheer stockings or pantyhose with a prominent thin rectangle heel reinforcement at the base of back seam (A thick rectangle heel reinforcement is a Havana Heel)

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a broad heel of medium height on women's shoes