A button works by passing through a hole and resting against the fabric on the other side.

The longer version

Fastening a button means pushing it through a slit slightly narrower than the button itself. The fabric around the hole stretches and then springs back, so the disc sits trapped against the underside. Gravity and the tension of the closed garment keep pulling the button against that fabric, and the thread holding it stops the disc from slipping straight back out.

Buttons long predate buttonholes. For centuries they were sewn on purely as decoration, and only when tailors began cutting matching slits did they become practical fasteners. That change let clothing fit closely to the body instead of being wrapped and pinned, which is why fitted garments became common in western dress from the thirteenth century onward. Ornaments quietly became hardware.

Where this entry sits

Odd Little Things looks at the ordinary objects people touch every day and the small mechanisms and histories hiding inside them. Buttons, zips, pencils, mirrors, stairs, stamps, packaging, and road signs all get their turn. The full list sits on the Odd Little Things page, where every entry is listed in order.