Uniqlo builds its clothes on Japanese fit blocks, and you can feel it the moment you put something on: trimmer through the chest and shoulders, narrower sleeves, and a slightly shorter torso than the typical American brand. That makes Uniqlo one of the most consistent brands to size for — once you know your Uniqlo size, it rarely surprises you — but it also means your usual US size is often one size too small.
Below are Uniqlo's published body measurements for women's and men's clothing, what the alpha sizes map to in US numeric sizes, and the fit quirks worth knowing before you order.
How does Uniqlo fit?
Uniqlo sizing is based on Asian fit standards — the brand says so itself — and the consensus among shoppers matches: pieces run slim and slightly short compared to US brands. US stock is partially graded up from Japanese stock, but most people coming from GAP-style American sizing still find their usual size snug.
- If you're between sizes or used to US brands, size up one.
- In anything labeled "slim fit," consider going up two sizes if you prefer a relaxed fit.
- Sleeves and torsos run short — taller shoppers should check garment lengths on the product page.
- Oversized lines (like many U collection pieces) are cut genuinely oversized; those you can take in your true size.
Women's size chart
Body measurements from Uniqlo's published US chart. Uniqlo adjusts charts per garment, so always confirm on the product page.
| Size | US size | Bust | Waist |
|---|---|---|---|
| XS | 0–2 | 31–32" · 78–83 cm | 24–25" · 60–65 cm |
| S | 4–6 | 33–34" · 83–88 cm | 26–27" · 65–70 cm |
| M | 8–10 | 35–37" · 88–94 cm | 28–30" · 70–76 cm |
| L | 12–14 | 37–40" · 94–101 cm | 30–33" · 76–83 cm |
| XL | 16–18 | 40–43" · 101–109 cm | 33–36" · 83–91 cm |
| 2XL | 20–22 | 43–46" · 109–117 cm | 36–39" · 91–99 cm |
Men's tops size chart
Body chest measurements. Men's bottoms are sold by numeric waist size in inches.
| Size | Chest |
|---|---|
| XS | 32–35" · 81.5–89 cm |
| S | 35–38" · 89–96.5 cm |
| M | 38–41" · 96.5–104 cm |
| L | 41–44" · 104–112 cm |
| XL | 44–47" · 112–119.5 cm |
| XXL | 47–50" · 119.5–127 cm |
Measurements are based on Uniqlo's published size charts and may vary by garment, fabric, and region. Always check the size chart on the product page before ordering.
Uniqlo sizing FAQs
Does Uniqlo run small?
Yes, generally. Uniqlo cuts its clothes on Japanese fit standards, so pieces run slimmer through the chest, shoulders, and sleeves than typical US brands. Most shoppers used to American sizing go up one size, and up to two in slim-fit lines.
What Uniqlo size should I get if I wear a medium at GAP?
Most people who wear a medium in American brands like GAP take a large at Uniqlo. Uniqlo's medium fits roughly like a US small-to-medium, with a trimmer cut through the body and shorter sleeves.
Is Uniqlo sizing the same as in Japan?
Not exactly. Uniqlo partially grades up sizes for the US market, so a US-bought medium is roomier than a Japan-bought medium with the same label. If you order from the Japanese lineup or shop in Japan, expect to size up further.
Are Uniqlo sizes consistent between items?
More than most fast-fashion brands. Uniqlo's fit blocks change little between seasons, so once you find your size in a category — tees, oxford shirts, chinos — it tends to hold. Just treat slim-fit and oversized lines as their own sizing.
