1 What It Means
The space between the outstretched thumb and the forefinger when the hand is spread as wide as it will go.
2 Caught in the Wild
He measured the fish by the purlicue, thumb to finger, and called it a foot long.
Illustrative usage. · Undated
3 Where It Comes From
Purlicue likely comes from the Scots word 'purley' or 'pirlie,' tied to older forms meaning a small curled or twisted space, though the exact root is uncertain past the early 1800s. It shows up in Scottish dictionaries and glossaries of dialect long before any general English dictionary picked it up. It never crossed into standard English because it named a measurement folk technique, not a formal unit. Once tailors, carpenters, and fishmongers moved to standardized rulers and inches, the hand itself stopped being a measuring tool, and the word that described one particular gap in it had no more work to do.
4 The World Behind the Word
Before rulers were common in every pocket, people measured things against their own bodies. A hand's span, a forearm's length, a thumb's width, these were working units in trades and households alike. The purlicue was one of these informal measures: stretch your hand as wide as it goes, and the gap between thumb and forefinger becomes a rough gauge, useful for judging the width of a plank, the size of a fish, or the thickness of a rope. Scots dialect speakers kept a name for this specific stretch long after standardized measurement tools made it obsolete elsewhere. The word persisted in regional speech because rural trades held onto body-based measuring longer than cities did, where imported rulers and tape measures arrived first.
5 Use It Yourself
Pull this out the next time someone eyeballs a gap with their hand, whether it is a fisherman exaggerating a catch or a friend trying to describe how wide a parking space is. It sounds invented, so be ready to explain it is a real dialect word, not a joke you made up on the spot.
Try it out loud
He held his hand up, purlicue stretched wide, and swore the gap in the fence was exactly that big.
🗝️The Deep Cut File
Hand-based measuring left more traces in English than people realize. The inch, the foot, the cubit, and the fathom all started as body parts pressed into service before standardization caught up. The purlicue never made that leap into official units, but it sat in the same family of thinking: your own hand as a portable ruler. Scots dictionaries kept recording it well into the 1800s even as England moved toward fixed measurement, which is part of why it reads today as a dialect curiosity rather than a forgotten unit of trade, the way a fathom or a hand still is in horse height.