Why Your Left Foot Is Different From Your Right — And Why It Matters More Than You Think

The Craft — No. 06

Most people assume their feet are a matching pair. They're not.

In thirty years of making and fitting shoes in Sydney, I have never measured a customer whose left and right foot were identical. Not once. The difference is sometimes subtle — a few millimetres in length, a slightly wider ball on one side. But occasionally the difference is significant enough that wearing the same size on both feet means one foot is always compromised.

This is not a flaw. It's anatomy.

Your dominant foot tends to be slightly larger. The foot you push off with when you walk bears more load over a lifetime, and that repeated pressure gradually spreads the tissue. Pregnancy, injury, and decades of ill-fitting shoes all contribute too. By the time most people reach their forties, the asymmetry is measurable — and worth paying attention to.

The problem with buying to your larger foot

The standard advice is to buy to your larger foot. It's reasonable advice, as far as it goes. But it doesn't go far enough.

When one shoe is slightly too long, your foot slides forward inside it. The heel lifts. The toes reach the end of the toe box sooner than they should. The shoe flexes in the wrong place. Over time, this creates uneven wear on the sole, asymmetrical breakdown of the heel counter, and — for many people — unexplained discomfort on one side that they never connect to the fit of their shoes.

What a proper fitting actually involves

When I fit a customer in the workshop, I measure both feet separately. Length, ball width, instep height, heel width. I note which foot is dominant and how the customer distributes their weight when they stand and walk. For a bespoke commission, we make two individual lasts — one for each foot — because the shoe that fits your left foot is not the shoe that fits your right.

For ready-to-wear, the asymmetry is managed differently. A skilled fitter will use insoles, heel pads, or tongue pads to compensate for the smaller foot, rather than simply handing you two shoes of the same size and calling it done.

What to look for in your own shoes

Take your current shoes off and look at the wear pattern on the soles. If one shoe is more worn than the other — particularly at the heel or the ball — your feet are not being treated as individuals. Look at the heel lining inside each shoe. If one side is more compressed or stained than the other, your foot is moving inside it when it shouldn't be.

These are signs that your shoes are working against the natural asymmetry of your feet rather than accommodating it.

Why it matters over a lifetime

Footwear is not just about comfort in the short term. The way your feet are supported — or not supported — over decades has consequences for your knees, hips, and lower back. An uneven gait, caused by shoes that fit differently on each foot, creates asymmetrical load through your entire skeletal structure. This is not a small thing.

The good news is that it is entirely addressable. It simply requires treating your feet as what they are — two different feet that deserve two different conversations.

Andrew McDonald has been making shoes by hand in Sydney since 1990. The workshop is at Shop 121, Level 2, The Strand Arcade, 412 George St, Sydney. Appointments for fitting and bespoke enquiries at andrewmcdonald.com.au