Uniqlo and Mango both lead with alpha sizes, and here's the surprise: their women's charts nearly line up letter for letter. Mango's S bust (86 cm) sits inside Uniqlo's S range (83–88 cm), its M (92 cm) inside Uniqlo's M (88–94 cm), and so on right up the chart. The men's charts align the same way. On paper, you can often keep your letter.
The differences live elsewhere. Uniqlo cuts on Japanese fit blocks — slim through the chest and shoulders, short in the sleeve and torso — while Mango is the most true-to-size of the Spanish high-street brands and cuts for a slightly taller frame, with sleeves and inseams that run long. And the two brands' US-size conversions disagree enough to trap anyone converting through numbers instead of measurements.
The short answer
The charts nearly match letter for letter — but the same letter wears slimmer and shorter at Uniqlo
By body measurement, this is one of the closer pairings around: Mango's single-value bust figures fall inside Uniqlo's ranges at every letter, women's and men's alike. So the letter is a fair starting point in both directions. The practical gap is in the cut — Uniqlo runs small with short sleeves and torsos, while Mango runs true to size and long, so the same letter feels trimmer and shorter at Uniqlo and roomier and longer at Mango.
The trap is the US-size conversion. Uniqlo says its M is a US 8–10; Mango says its M is a US 6 — yet Mango's M is measurably the bigger garment on the bust. Convert through centimetres or inches, never through the US number. Also note Mango's wide grading above S: each size up adds more room than the step below, so its L and XL run roomier than the letter suggests, while Uniqlo's slim-fit lines need a size up or two.
Uniqlo vs Mango at a glance
| Uniqlo | Mango | |
|---|---|---|
| Sizing system | Alpha sizes built on US numeric sizing (M = US 8–10) | Alpha sizes built on EU sizing (M = EU 38, labeled US 6) |
| Overall fit | Runs small — slim Japanese fit blocks | True to size — the most reliable of the Spanish high-street brands |
| Lengths | Sleeves and torsos run short | Cut for a taller frame — sleeves and inseams run long |
| Grading | Even steps between sizes | Steps widen above S — L and XL run roomier than the step below |
| Where to size up | Coming from US brands; two sizes in slim-fit lines | Fitted woven dresses and jeans — they run snug |
The US-size trap: what each brand calls the same letter
Each brand's own published US-size equivalents. The letters describe similar bodies (see the next table), but the US conversions disagree by two sizes — convert by measurement, not by US number.
| Size | Uniqlo US size | Mango US size |
|---|---|---|
| XS | 0–2 | 2 |
| S | 4–6 | 4 |
| M | 8–10 | 6 |
| L | 12–14 | 8 |
| XL | 16–18 | 10 |
Women's body measurements side by side
Body measurements from each brand's published chart. Mango publishes single values, Uniqlo publishes ranges — and Mango's values fall inside Uniqlo's range at every letter.
| Size | Uniqlo bust | Mango bust | Uniqlo waist | Mango waist |
|---|---|---|---|---|
| XS | 31–32" · 78–83 cm | 82 cm · 32.3" | 24–25" · 60–65 cm | 62 cm · 24.4" |
| S | 33–34" · 83–88 cm | 86 cm · 33.9" | 26–27" · 65–70 cm | 66 cm · 26" |
| M | 35–37" · 88–94 cm | 92 cm · 36.2" | 28–30" · 70–76 cm | 72 cm · 28.3" |
| L | 37–40" · 94–101 cm | 98 cm · 38.6" | 30–33" · 76–83 cm | 78 cm · 30.7" |
| XL | 40–43" · 101–109 cm | 104 cm · 40.9" | 33–36" · 83–91 cm | 85 cm · 33.5" |
| 2XL / XXL | 43–46" · 109–117 cm | 110 cm · 43.3" | 36–39" · 91–99 cm | 92 cm · 36.2" |
Men's tops side by side
Body chest measurements. Mango Man's single values land inside Uniqlo's ranges at every letter, so the letter carries over on paper — Uniqlo's cut is the trimmer of the two.
| Size | Uniqlo chest | Mango chest |
|---|---|---|
| XS | 32–35" · 81.5–89 cm | 87 cm · 34.3" |
| S | 35–38" · 89–96.5 cm | 95 cm · 37.4" |
| M | 38–41" · 96.5–104 cm | 101 cm · 39.8" |
| L | 41–44" · 104–112 cm | 107 cm · 42.1" |
| XL | 44–47" · 112–119.5 cm | 113 cm · 44.5" |
Switching between Uniqlo and Mango
- Keep your letter as the starting point in both directions — the body charts align — but expect the Uniqlo piece to wear slimmer and shorter, and the Mango piece roomier and longer.
- Never convert through US numbers between these two: Uniqlo's M is a US 8–10 while Mango's M is a US 6, even though the garments measure alike.
- Watch lengths: Mango sleeves and inseams run long (petite shoppers, check garment lengths), while Uniqlo runs short (tall shoppers, do the same).
- Both brands have snug spots — size up in Mango's fitted woven dresses and jeans, and in anything Uniqlo labels slim fit.
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 Uniqlo size guide and the Mango size guide.
Uniqlo vs Mango sizing FAQs
Which runs smaller, Uniqlo or Mango?
By the charts, neither — Mango's bust and chest values fall inside Uniqlo's ranges at every letter. In practice Uniqlo wears smaller: it cuts slim on Japanese fit blocks with short sleeves and torsos, while Mango runs true to size and slightly long. Same letter, trimmer feel at Uniqlo.
Is a Uniqlo medium the same as a Mango medium?
On the chart, essentially yes — Mango's M bust (92 cm) sits inside Uniqlo's M range (88–94 cm). On the body, the Uniqlo M will feel slimmer and shorter. Confusingly, Uniqlo calls its M a US 8–10 while Mango calls its M a US 6, so ignore the US numbers and trust the measurements.
Why do the US size conversions disagree?
Uniqlo bases its alpha sizes on US numeric sizing, while Mango's are built on EU sizing and converted regionally — its M is an EU 38, which Mango labels US 6. Neither is wrong; they're different conversion conventions. Between these two brands, centimetres and inches are the only safe common language.
I'm a Mango L — will Uniqlo L fit?
Probably, with caveats. Mango's L bust (98 cm) sits inside Uniqlo's L range (94–101 cm), so the letter matches. But Mango grades generously above S — its L runs roomy — while Uniqlo cuts slim, so if you like the relaxed feel of your Mango L, consider Uniqlo XL, especially in slim-fit pieces.
Which is better for tall or petite shoppers?
Mango cuts for a slightly taller frame — sleeves, hems, and inseams run long — which tall shoppers love and petite shoppers should check. Uniqlo is the reverse: sleeves and torsos run short, which suits petite frames and means taller shoppers should check garment lengths on the product page.
