Your waist size is fine. It's everything else that doesn't fit.

Two pairs of jeans. One costs £400, the other £85. Both are labelled 32. Both give you about 77 centimetres of leg — roughly 30.5 inches. Neither is lying to you. But neither is telling you much, either.

The label makes two promises

Men's denim carries a labelling convention that most of us stopped reading years ago: a waist in inches, and a length in inches. W32 L32. Two numbers, two promises.

The first promise still holds. The second one quietly stopped meaning anything, and almost nobody has noticed - including, it seems, some of the brands printing it.

The waist number is honest

Start with what works, because it genuinely does.

Levi's publishes a size chart that maps size 32 to an 81.3cm waist. Thirty-two inches is 81.28 centimetres. That is not an approximation - it is an exact conversion, and it holds across the entire run. Size 28 maps to 71.1cm. Size 30 to 76.2cm. Size 34 to 86.4cm. Every one lands on the inch.

ASOS does the same: their W32 maps to 81cm.

So when people say men's denim sizing is dishonest, the data doesn't support it. The waist figure is a body-measurement claim, and at these brands it is accurate to the millimetre. Any jean will measure wider than that when laid flat, but that is ease — the room a garment needs to go around a body and still move. That is how trousers work, not evidence of deception.

There is drift between brands, and it is worth knowing about. COS's size chart maps size 32 to an 85.5cm waist - 33.7 inches on a label that says 32. Both brands instruct you to measure at the narrowest point, so the methods are comparable. That's a 4.2cm gap between two jeans wearing the same number.

But drift of an inch and a half is a very different problem from a number that means nothing at all. Which brings us to the second promise.

The length number doesn't survive contact

Our Legacy's Third Cut jeans are sold as 28/32, 29/32, 30/32, up to 36/32. Read that as waist by length - the way every denim buyer alive reads it - and it promises a 32-inch inseam on every size.

Their own published measurements say the inseam runs from 74.6cm to 78.8cm. That is 29.4 to 31 inches. Not one size in the run measures 32.

To be clear: Our Legacy publishes a full measurement table for every product, in centimetres, taken flat. That is better practice than most of the industry manages. The numbers are right there, freely available, which is the only reason this article can exist. The problem isn't the table. It's that the label and the table don't agree, and only one of them is printed on the garment.

Now look at COS. Their Signature Regular-Fit jean sells in fourteen waist and length combinations, and the product page states that the inside leg of size 32 is 77.4cm.

Our Legacy's size 32: 77cm. COS's size 32: 77.4cm.

Four millimetres apart. A £400 jean and an £85 jean, both carrying a "32" length marker, both delivering about thirty and a half inches.

Two brands arriving at the same answer independently is not a quirk. It is a convention that has drifted away from what it says.

Your waist chooses your leg length

There is a second, quieter problem underneath.

Our Legacy's Third Cut runs from 74.6cm of inseam at size 28 to 78.8cm at size 36. Their Vast Cut runs from 75cm at size 44 to 80cm at size 54. In both, the leg gets longer as the waist gets wider. Automatically. There is no length option at checkout.

If you are short and broad, you are handed up to five centimetres of leg you never asked for. If you are tall and narrow, the opposite.

COS does better here - those fourteen combinations are a genuine choice. But the choice is partial: a 28 waist is only available in a 30 length, and a 36 only in a 34. The extremes are still unserved.

And there's one more thing worth noticing. Our Legacy sells two jeans, same denim, same category. Their Third Cut in size 32 has a 44.5cm waist and a 77cm inseam. Their Vast Cut in size 48 has a 44.5cm waist and a 77cm inseam.

Identical on both numbers a shopper uses to choose. Labelled 32 and 48.

The cuts genuinely differ - the Vast Cut is nearly two centimetres wider in the thigh and sits slightly lower. Those are real design decisions and a shopper might well want one over the other. But nothing in the two labels tells you that, and nothing connects them to each other.

This isn't a scandal. It's an inherited system.

It would be easy to write this as an exposé. It isn't one.

Nobody designed this confusion. The W/L convention is a twentieth-century artefact built for a narrower range of cuts than exists today, and most brands inherited it rather than chose it. As silhouettes multiplied - barrel, wide, relaxed, cropped - the second number stayed put while the thing it described moved underneath it.

And it can be fixed. Levi's demonstrates as much. Alongside those exact waist figures, they publish an inseam-to-height guide: a 32-inch inseam for someone 172.7 to 182.8cm tall, 34 inches for 182.8 to 193cm. They tell you which length matches your body. It costs them nothing and it removes the guesswork entirely.

Four things that would close the gap

Publish the body waist the size is cut for. COS already has this figure. Moving it from a size chart most shoppers never open onto the product page, next to the size selector, would resolve most of the drift problem immediately.

State the garment inseam per size, not per style. Our Legacy already publishes the full table. The gap is that the label's second number doesn't match it.

Offer discrete lengths, and say which body they're for. Levi's does both. COS offers the lengths without the guidance. Our Legacy offers neither.

Say when a jean is designed to be hemmed. Most full-length denim is. Almost nobody says so — and saying so turns a return into an alteration.

What you can do about it tonight

Measure the garment, not the label.

If you own a pair that fits, lay them flat and measure the inside leg from the crotch seam to the hem. That number is more useful than anything printed on the tab, and it travels between brands in a way the label doesn't.

And if the waist fits but the leg is long - that isn't a return. That's about £15 at a tailor, and it is the cheapest fix in fashion.

The label was never really the problem. The problem is everything the label doesn't say.

Methodology

All figures are taken from the brands' own published size guides and product pages, captured on 27 July 2026.

Our Legacy garment measurements are taken flat across the garment in centimetres, per the brand's stated method, from ourlegacy.com product size guides. COS figures are from cos.com/en-gb — the size run and inside-leg statement from the Signature Regular-Fit Straight-Leg Jeans product page, the waist figure from the COS body size chart. Levi's figures are from the Levi's GB size chart. The ASOS figure is from the ASOS men's jeans size guide.

Body measurements and garment measurements are different things and are labelled as such throughout. Waist figures for Levi's, ASOS and COS are body measurements - the body the size is cut for. Our Legacy's figures are garment measurements. No figure here has been converted between the two.

Published specifications are production targets and carry manufacturing tolerance. Individual pairs will vary.

Our Legacy's Third Cut appears under different size numbering at some third-party retailers. All claims here are sourced to the brand's own site only.

No figure in this article comes from a third-party size aggregator.