Levi's and Primark could hardly disagree more about what a size means. Levi's puts the measurement on the label — jeans are sized by actual waist in inches, and men's pairs even fit about half an inch to an inch above the number. Primark labels in UK sizes, runs small in exactly the fitted categories where it hurts (denim above all), and is famously loose on garment-to-garment consistency — it even revised its chart in 2021 after complaints.
Two fairness notes before the tables. Levi's published guide is jeans-specific while Primark's women's chart covers its clothing in general, so this isn't quite apples-to-apples. And because Primark publishes in centimetres against Levi's inches, the only honest way to compare is the one used below: every row is aligned by body waist measurement, never by label.
The short answer
Primark runs smaller — its own staff recommend sizing up in denim, while Levi's jeans fit the number on the label.
On paper the charts aren't far apart: a Primark UK 12 waist (74 cm · 29") lines up with a Levi's 28 (29.25" · 74.5 cm) almost exactly. The gap opens in the actual garments. Levi's runs true to size as a baseline — the exceptions are deliberate, fit-specific cuts like the Ribcage and rigid 501s. Primark's smallness is the unplanned kind: jeans, fitted dresses, and tailored shirts commonly fit under the label, and two copies of the same garment can measure differently.
That changes how you should use the mapping below. Coming from Levi's, treat the waist-matched Primark size as a floor, not an answer: in Primark denim, take it and go one up. Coming from Primark, your Levi's size is easier to find than your Primark one — measure your waist in inches and buy that number; it will be more reliable than anything either label has told you so far.
Levi's vs Primark at a glance
| Levi's | Primark | |
|---|---|---|
| Sizing system | Waist-in-inches: men's W×L, women's numeric 24–34 | UK numeric sizing (4–20) with EU and US conversions; chart published in cm |
| Overall fit | True to size on paper; varies by fit line (Ribcage small, rigid 501 tight) | Runs small — worst in jeans, fitted dresses, and tailored shirts |
| Denim advice | Label is a real waist measurement; size up only in rigid or small-running fits | Size up one as standard — even Primark staff recommend it |
| Consistency | Each fit is stable season to season once you know it | Famously loose — identical items can fit differently |
| Lengths | You choose the inseam via the L number (e.g. 32×34) | One length per size; men's bottoms sold by waist in inches |
Levi's women's sizes in Primark UK sizes
Rows aligned by body waist measurement, not label. Primark's chart steps don't match Levi's one-inch steps, so several Levi's sizes land between two UK sizes. This is the on-paper mapping — Primark denim runs small, so treat it as a floor and size up from it.
| Levi's size | Body waist (Levi's chart) | Primark size by waist |
|---|---|---|
| 24 | 25.25" · 64 cm | between UK 6 and UK 8 |
| 25 | 26.25" · 66.5 cm | UK 8 (66 cm · 26") |
| 26 | 27.25" · 69 cm | UK 10 (70 cm · 27.5") |
| 27 | 28.25" · 72 cm | between UK 10 and UK 12 |
| 28 | 29.25" · 74.5 cm | UK 12 (74 cm · 29") |
| 29 | 30.25" · 77 cm | between UK 12 and UK 14 |
| 30 | 31.25" · 79.5 cm | UK 14 (79 cm · 31") |
| 31 | 32.75" · 83 cm | between UK 14 and UK 16 |
| 32 | 34.25" · 87 cm | UK 16 (85 cm · 33.5") |
| 33 | 35.75" · 91 cm | between UK 16 and UK 18 |
| 34 | 37.75" · 96 cm | between UK 18 (94 cm · 37") and UK 20 |
Women's waist side by side
Aligned by body waist, not label. Primark publishes in cm (inches converted); Levi's in inches (cm converted). Primark's chart covers its clothing generally while Levi's is jeans-specific — and remember a Primark UK 12 is a US 8, not a 12.
| UK | EU | US | Primark waist | Closest Levi's size (waist) |
|---|---|---|---|---|
| 8 | 36 | 4 | 66 cm · 26" | 25 (26.25" · 66.5 cm) |
| 10 | 38 | 6 | 70 cm · 27.5" | 26 (27.25" · 69 cm) |
| 12 | 40 | 8 | 74 cm · 29" | 28 (29.25" · 74.5 cm) |
| 14 | 42 | 10 | 79 cm · 31" | 30 (31.25" · 79.5 cm) |
| 16 | 44 | 12 | 85 cm · 33.5" | 31 (32.75" · 83 cm) or 32 (34.25" · 87 cm) |
| 18 | 46 | 14 | 94 cm · 37" | 34 (37.75" · 96 cm) |
Hip measurements at the same waist
Jeans live or die on the hip as much as the waist. Rows pair a Primark size with the Levi's size closest to it by body waist, then compare each chart's hip figure. Both columns are body measurements from each brand's chart.
| Body waist (approx.) | Primark size · hip | Levi's size · hip |
|---|---|---|
| 66 cm · 26" | UK 8 · 90 cm · 35.5" | 25 · 35" · 89 cm |
| 74 cm · 29" | UK 12 · 98 cm · 38.5" | 28 · 38" · 96.5 cm |
| 79 cm · 31" | UK 14 · 103 cm · 40.5" | 30 · 40" · 101.5 cm |
| 85 cm · 33.5" | UK 16 · 109 cm · 43" | 32 · 43" · 109 cm |
Switching between Levi's and Primark
- Going Levi's → Primark: match your Levi's waist to the cm chart to find your UK size, then go one up in jeans, fitted dresses, and tailored shirts — Primark's fitted pieces run small even against its own chart.
- Going Primark → Levi's: skip the conversion entirely. Measure your waist in inches and buy that Levi's number — it's more dependable than working back from a Primark label that may itself run small.
- Don't read Primark's numbers as US sizes: a Primark 12 is a UK 12, which is a US 8 — roughly a Levi's 28 by waist.
- Primark's consistency varies garment to garment, so check the measurements on the label rather than trusting the size; at Levi's the wildcard is fabric instead — rigid fits need a size up, stretch washes relax with wear.
Measurements are based on each brand's published size charts and may vary by garment, fabric, and region. For the full charts and fit notes, see the Levi's size guide and the Primark size guide.
Levi's vs Primark sizing FAQs
Which runs smaller, Levi's or Primark?
Primark. Its charts sit close to Levi's on paper — a UK 12 waist (74 cm · 29") is nearly a Levi's 28 (29.25") — but Primark's fitted garments, jeans above all, commonly fit under the label, and even Primark staff recommend sizing up in denim. Levi's jeans fit the measurement printed on them.
What Levi's size is a Primark UK 12?
By waist, a Levi's 28: Primark lists a UK 12 at 74 cm (29") and a Levi's 28 covers a 29.25" (74.5 cm) waist. Keep in mind that's the on-paper match — if your Primark 12 jeans fit because you already sized up, your true match may be a Levi's 27.
Do men's waist sizes transfer between Levi's and Primark?
Both sell men's bottoms by waist size in inches, so the labels speak the same language — but not with the same accuracy. Levi's states each W size actually fits a body waist about half an inch to an inch above the label, while Primark runs small in fitted styles and uneven between garments, so the same number can fit tighter there.
Why do my Primark jeans vary in fit when my Levi's don't?
Primark's garment-to-garment consistency is looser than most brands — manufacturing tolerances differ across factories and batches, so two copies of the same jean in the same size can measure differently. Levi's variation is deliberate instead: a 511 is cut slimmer than a 501 by design, but each fit holds steady.
Is Primark's sizing still small after the 2021 chart change?
Improved, but the tendency remains. Primark revised its size chart in 2021 after widespread complaints, and shoppers report better results since — yet fitted styles, denim included, still trend small. The size-up-in-jeans rule survives the revision, which is why the waist-matched Levi's size above should be treated as Primark's minimum.
