The thing nobody says clearly: a roomy standard-width shoe is not a wide shoe. A genuine wide is built on a wider last, so the whole footbed is wider and the shoe is a different shape. A standard shoe with a stretchy upper just lets your foot spread over the edge of a footbed that is still too narrow, which is why it feels fine in the shop and leaves pressure marks by hour six.
How to tell the difference
Take the insole out of a shoe you own and stand on it. If your foot overhangs the sides, the footbed is too narrow regardless of how the shoe feels - your foot is being supported by the upper rather than by the platform. That is the whole test, it takes ten seconds, and it is more reliable than anything a size chart will tell you.
The other signal is the width designation itself. Standard is D for men and B for women. Wide is 2E for men and D for women; extra-wide is 4E and 2E respectively. A shoe sold only in one width, however generously cut, is a standard shoe.
Why going up a size does not work
It is the obvious move and it creates two new problems. A longer shoe puts the widest part of the footbed behind the widest part of your foot, so the shoe is still narrow exactly where you need width - and your heel now sits in a heel cup that is too big, so it slips and your toes slide forward on every step. On a twelve-hour shift that produces blisters at the heel and bruised toenails at the front.
Width and length are independent. Fix the width.
Wide foot versus wide toe box
Another conflation worth separating. A wide foot needs width through the midfoot and forefoot - a wider last. A wide toe box is specifically about room for your toes to splay, and some shoes have a generous toe box on an otherwise narrow last.
If your pressure points are at the ball of the foot, you need a wider last. If your toes feel crushed together but the midfoot is fine, you need toe box volume, and a molded shell like the work clog on this page may suit you better than a wide version of a stitched shoe. If you have bunions, the toe box is the whole question and that page is more specific.
Swelling makes this worse across a shift
Feet swell measurably over twelve hours of standing, and for many people that is close to a full width. A shoe that is correct at 7am can be genuinely tight at 6pm.
Two practical consequences. Buy and fit shoes late in the day, when your feet are at their largest. And if you are between widths, take the wider one - the shoe you can live in at hour eleven matters more than the one that feels perfect at hour one.
Where the wide versions actually are
A frustration worth naming: the wide version of a premium shoe is frequently a special order with fewer colorways and slower delivery. Two things follow from that. First, New Balance is genuinely the easiest place to find real widths in stock, which is why it leads this page. Second, the budget work shoes at the bottom are unusually easy to find in wide sizes at ordinary retail, which is a real advantage when you need shoes this week rather than next month.
The other option worth remembering is a clog. An open back removes one whole dimension of fit, and the forefoot is a molded box rather than a stitched upper under tension - which is why clogs suit wide feet better than their reputation suggests.