Vans run true to size out of the box and looser after a month, because the canvas stretches across the widest part of your foot. That single fact is why half the internet says true to size and the other half says size down, and both are right. Pick your model and which fit you are buying for.
Both answers are correct, which is the actual problem
Search whether Vans run big and you will get a flat contradiction. Half the results say true to size. The other half say order half a size down, with equal confidence and no apparent doubt. This is unusual: most sizing disagreements are noise, but this one is two groups of honest people describing the same shoe and reaching opposite conclusions.
The reason is that a Vans upper is canvas, and canvas stretches. Not evenly, either: it gives across the widest part of your foot, which is precisely where fit is decided. A pair that fits properly in the shop is noticeably looser a month later. So someone reviewing a new pair says true to size, someone describing the pair they have worn all summer says they run big, and neither of them is wrong. The disagreement is about time.
The formula
order size = your usual size, or half a size down for the long view
Slip-On = half a size down either way
UK = US men's − 0.5 | EU = US men's + 33
Every classic model measures true to size new. The half size down is not a correction to the shoe, it is a decision about which point in the shoe's life you want the fit to be right. The Slip-On is the one model where that decision is made for you, for a reason worth its own section below. Conversions match our shoe size converter, so the two pages cannot disagree.
Worked example
Say you wear a US men's 10 and you want Old Skools. Buying for the day they arrive, your size is a plain 10, which reads UK 9.5 and EU 43. Buying for the pair you will still be wearing next summer, it is a 9.5, and it will feel slightly tight for the first couple of weeks, which is the point. Now switch to Slip-Ons at the same size: 9.5 either way, because that model has no laces to take up the slack once the canvas has given, so the decision has already been made for you.
The Slip-On is the one everyone agrees on
Laces are not just fastening, they are adjustment. As a laced shoe stretches you pull the laces tighter and the fit stays roughly where it was, which is why an Old Skool that loosens is annoying rather than useless. A Slip-On has nothing. The elastic gores hold it on your foot and that is the entire mechanism, so when the canvas gives there is no way to take up the slack.
That is why the size-down advice for Slip-Ons is close to universal while the advice for everything else is contested. It is not that the Slip-On runs bigger than the Old Skool in any meaningful sense. It is that the Slip-On cannot be adjusted afterwards, so the sizing has to anticipate the stretch instead.
Do not take half a size off twice
The most common way to get this wrong is to read the general advice about sizing down, apply it, and then apply it again on top of a model that already accounts for it. Two half sizes is a full size, and a full size down in an unstructured canvas shoe is not a snug fit, it is a shoe you will stop wearing.
The calculator above will not do this to you: when a model already prices in the stretch, asking for the long view does not stack a second reduction. If you are ordering from a chart rather than from here, the rule is that you get one adjustment, and it belongs either to the model or to your preference, never to both.
How this compares to our other brand pages
Each of these reaches a different conclusion, and the differences are about materials rather than about brands being inconsistent. Chuck Taylors run a genuine half size large, so there the size down is a correction rather than a choice. Air Jordans are true to size in length and the real variable is width, with the patent-uppered Jordan 11 never giving at all. Yeezy has no single answer, because the 350 and the 700 are barely the same kind of shoe.
The general lesson across all four: a shoe that stretches and a shoe that does not are different sizing problems, and most bad advice comes from applying the rule for one to the other. Canvas gives. Patent leather does not. Knit uppers do something else again.
Frequently asked questions
Do Vans run big or small?
Both, depending on when you ask. A new pair is true to size; the same pair a month later is loose, because canvas stretches across the widest part of your foot. That is why you will find confident and opposite answers everywhere, and why the useful question is whether you are sizing for day one or for the life of the shoe.
Should I size down in Vans?
Half a size down if you want them to still fit once they have given, and your usual size if you want them right immediately. The exception is the Slip-On, where sizing down is the default because there are no laces to take up the slack later. Never take two half sizes off, which is a full size, and is how people end up with a pair they cannot wear.
Do Old Skools run true to size?
New, yes, with a slightly roomier toe box than the Authentic. This is the model the size-down advice is usually about, and the people giving it are almost always describing a broken-in pair rather than one out of the box. If you like a snug fit or you are between sizes, half down is reasonable.
Do Vans Slip-Ons stretch out?
More than any other model in the line, and it matters more because there is nothing to compensate with. A laced shoe can be tightened as the canvas gives. A Slip-On cannot, so the fit you have after a month is the fit you are stuck with, which is why half a size down is the standard recommendation rather than a preference.
Are Vans narrow?
They are built on a standard medium width, which reads narrow to anyone used to a roomy toe box and fine to everyone else. The saving grace is the canvas: unlike a leather or patent upper, it genuinely does give across the width, so a Vans that is slightly tight when new is a different proposition from a leather shoe that is slightly tight when new.
Do Sk8-His fit differently from Old Skools?
In feel rather than in length. The Sk8-Hi measures true to size like the rest, but the high collar grips the ankle and makes the whole shoe read snugger than it is. The extra structure also means it holds its shape slightly better over time than the low tops do.
How do Vans sizes convert to UK and EU?
UK is half a size below US men's and EU is US men's plus 33, so a US men's 10 is a UK 9.5 and an EU 43, about 27.1 cm of foot. Those are the same conversions our shoe size converter uses, so the two pages cannot give you different answers.
Are men's and women's Vans the same shoe?
Most of the classic models are unisex and lasted on the men's scale, which is why a pair carries both numbers on the label. A women's size is the men's size plus about 1.5, so a women's 8.5 and a men's 7 are the same shoe. If you are ordering from a women's listing, check which number the size refers to before you buy.