The Tiny Pocket on Your Jeans Was Made for a Watch

Look at the front right pocket of almost any pair of jeans and you will find a smaller pocket sitting inside it, too small for a phone and a bit fiddly for keys. Most people use it for coins, a guitar pick, a folded ticket or nothing at all. It was designed for something very particular: a pocket watch.

Jeans began as workwear, and they were built to survive hard days. In 1873 a tailor and a cloth merchant in the United States received patent number 139,121 for an improvement in fastening pocket openings. The improvement was the copper rivet, set into the corners of the pockets so they would not rip when a worker stuffed them with tools and heavy odds and ends. The merchant's company, Levi Strauss & Co., still makes jeans today.

By the late 1870s the small pocket had joined the design. In those years the wristwatch was not yet an everyday object. A working man who owned a watch carried it on a chain, tucked into a waistcoat or into a small pocket in his trousers. A snug pocket just below the waistband kept the watch safe, easy to reach, and out of the way of the dust and bumps of a working day.

The pocket then outlived its job. Wristwatches took over during the twentieth century, but the little pocket stayed, partly out of habit and partly because the shape of jeans had become a classic that nobody wanted to tamper with. On many pairs it is still riveted at the corners, a small reminder of how seriously the original makers took the risk of a pocket tearing.

It is often called the fifth pocket, but that is a small mix-up. The early jeans had four pockets: three at the front, including the watch pocket, and one at the back on the right. The back left pocket, the true fifth, did not appear until 1901. So the watch pocket is one of the oldest parts of the whole design, not a later extra.

Even the names of the cloth hide older journeys. The word jeans comes from Gênes, the French name for the Italian port of Genoa. Denim comes from de Nîmes, meaning from Nîmes, a town in France whose weavers made a similar sturdy twill fabric.

We know where the pocket came from because the patent survives and the company that has sewn jeans since the 1870s documents its own design history, pocket by pocket, rivet by rivet. The little pocket is not a mistake or a decoration. It is a time capsule stitched into millions of pairs of trousers, from an age when checking the time meant reaching into your pocket rather than glancing at your wrist. Which, now that phones live in pockets again, is roughly where we started.