At first glance, this metal loop attached beneath a boot may look like a strange step or bracket, but it is actually a stirrup, one of the most recognizable and important parts of horse-riding equipment.

A stirrup is the foot support that hangs down from a saddle on either side of a horse. The rider places their foot in it while mounting, riding, balancing, and guiding the horse. In the image, you can see the boot resting inside the stirrup, exactly how it is meant to be used.

The main purpose of a stirrup is to give the rider stability and support. Without stirrups, staying balanced on a moving horse would be much harder, especially during turns, jumps, or faster riding. They help the rider keep proper posture, distribute weight more evenly, and maintain better control over body position.

Stirrups are also very important when mounting a horse. A rider typically puts one foot into a stirrup first, then uses it as leverage to swing the other leg over the saddle. Once seated, both feet rest in the stirrups to create a more secure riding position.

Modern stirrups come in different shapes and materials depending on the style of riding. Some are designed for general riding, while others are specialized for jumping, dressage, trail riding, or western riding. The textured footbed seen here helps prevent the boot from slipping, which adds grip and safety.

So what is this thing used for? It is used to support a rider’s foot while riding a horse, helping with balance, control, and mounting. In simple terms, it is a horse stirrup — a small piece of equipment that plays a huge role in safe and effective riding.