Feet that can be difficult to fit include those with narrow heels, a wide forefoot, or high or low arches. (1) Narrow heel: Your heel is narrower than the average compared to your forefoot (the front part of your foot). If the heel of your shoe often feels loose or your heel feels unsupported in a shoe or boot, this could be you. (2) Wide forefoot: The front part of your foot (the ball and the toes) is wider than the average foot. If your forefoot or toes often feel squeezed in a shoe or boot, this could be you. (3) High arches: The arch (or instep) of the foot is the raised part between the ball and the heel. If you imagine a typical footprint (for example, from wet feet on a floor) you’ll see the ball and the heel joined in a bean shaped print. If you have a high arch, the print left by the heel and the ball will be separate/won’t join together. (4) Low arches: These are sometimes called flat feet or fallen arches. It means the instep arch is either low or missing completely (that is, nearly all or all of the bottom surface of the foot connects to the ground, so your footprint looks like an entire foot). This is really common, but it can mean that your feet roll in when you walk.