Why Your Feet Seem to Have Gotten Bigger
You’ve bought the same shoe size your entire adult life.
It’s practically part of your identity at this point – you can walk into a shop, grab your size off the shelf without trying it on, and walk out with total confidence.
And then, one day, that size just doesn’t fit anymore.
Not “a bit snug”, rather it’s actually too small.
Did your feet grow? Weren’t they supposed to be done with that decades ago?
As it turns out, feet have a habit of quietly changing size well into adulthood, and there are a few genuinely good explanations for it – most of which have nothing to do with you suddenly growing, and everything to do with what’s been happening to the structure of your feet over time.
Your Arches Have Probably Dropped a Little
This is the big one. The arch of your foot is held up by ligaments and tendons, and like most ligaments and tendons in the body, they lose a bit of their springiness over the years. As the arch flattens even slightly, the foot spreads out. This means it gets longer and wider, without a single bone actually growing.
This is a completely normal part of ageing (annoying, but normal), and it tends to speed up with things like pregnancy, significant weight changes, or years of standing on hard surfaces for work.
Your foot isn’t growing. It’s just… relaxing into a flatter, wider version of itself, one that happens to need a bit
more shoe to contain it.
Weight Changes Play a Bigger Role Than You’d Think
Extra weight puts extra downward pressure through the arch every time you take a step, which accelerates that flattening-and-spreading process. This is also why pregnancy so often permanently bumps people up a shoe size – the combination of extra weight and hormonal changes (relaxin, a hormone that loosens ligaments to help the body prepare for birth, doesn’t discriminate between the pelvis and the feet) is basically a perfect storm for arch drop.
It Might Not Actually Be Length — It Might Be Width or Swelling
Sometimes “my feet got bigger” is really “my feet got wider,” which can happen independently of any real length change, thanks to the same arch and ligament changes mentioned above.
Other times it’s simply fluid retention, perhaps from heat, long periods of standing, certain medications, or circulation changes, making feet swell up without any structural change at all. This kind of swelling-based sizing issue tends to come and go rather than being permanent.
Bunions and Other Structural Changes Can Also Be Involved
If the width increase seems to be concentrated specifically at the ball of the foot or around the big toe joint, a bunion (or a bunion quietly developing) could be behind it. Bunions cause the big toe joint to widen and protrude, which can make your usual shoe width suddenly feel like it’s fighting you, even if the rest of your foot hasn’t changed much at all.
So, Is This Something to Worry About?
A gradual size change over years is common and usually not a sign of anything serious on its own. It’s just what feet do over a lifetime of carrying you around.
That said, it’s worth a proper look if the change came on quickly rather than gradually, if it’s paired with pain, or if one foot has changed noticeably more than the other (feet are rarely perfectly symmetrical, but a sudden or significant difference between the two is worth checking out).
The practical takeaway either way: it’s worth getting your feet properly measured again rather than continuing to buy your “usual” size out of habit. Squeezing a changed foot into an old size for years on end is a solid way to end up with blisters, bunions, or general daily discomfort that’s entirely avoidable.
If your shoe size has crept up and you’re not sure why, book in with the team at Hurst Podiatry and we’ll help you work out exactly what’s changed.
