What’s the Purpose of That Tiny Hole in a Safety Pin? (It’s Not Just for Looks!)

You’ve probably reached for a safety pin countless times — to fix a fallen hem, secure a garment in a hurry, or handle a quick clothing emergency. But if you look closely at one, you’ll notice a tiny hole near the rounded head of the pin. Most people assume it’s just part of the design. It’s not.

That small opening actually serves a practical purpose. It acts as a threading guide, allowing you to attach ribbon, string, elastic, or narrow tape directly to the pin. While the safety pin fastens fabric layers together, the added thread can stay positioned exactly where you need it.

Here’s how it works: thread a piece of ribbon, twine, or elastic through the small hole near the pin’s head. Close the safety pin as you normally would, securing your fabric. When you later remove the pin, the threaded material remains in place, marking the exact path for sewing, gathering, or adjusting.

Sewing enthusiasts often use this trick when inserting elastic into waistbands or drawstrings into hoodies. Instead of tying the elastic around the curved end — where it can slip off — the tiny hole keeps it firmly anchored as you guide it through a fabric channel.

The design dates back to the original safety pin patent filed by Walter Hunt in 1849. While the coiled spring mechanism is what made the invention revolutionary, the small structural details, including the hole, were carefully considered for strength and versatility.

Beyond sewing, the hole can also help attach tags, secure decorative elements, or fasten temporary labels without bulky knots. It adds flexibility to an already simple tool, expanding its usefulness in subtle ways.

It’s a reminder that everyday objects often carry thoughtful engineering hidden in plain sight. A safety pin may look basic, but its design reflects efficiency and problem-solving refined over generations.

So the next time you grab one from a drawer, take a second look. That tiny hole isn’t decorative at all — it’s a smart little feature that turns a basic fastener into a multitasking tool.