How Uniqlo sizing works
Uniqlo uses alpha sizing (xs to xl with measurements). Measure your snug underbust and standing bust as described in our fit guide, then read your size from the chart below. If you already know your size in another system, convert it first with our size converter.
Good to know: Alpha sizes with centimeter guidance; check the chart.
Chart guide
| Alpha size | Rough band | Rough cup |
|---|---|---|
| XS | 30–32 | AA–A |
| S | 32–34 | A–B |
| M | 34–36 | B–C |
| L | 36–38 | C–D |
| XL | 38–40 | D and up |
Approximate mapping only. Alpha sizes vary widely; always check the brand measurements.
Brand charts change over time. If anything here disagrees with the official chart linked above, the official chart wins. The outbound link is provided for reference.
Frequently asked questions
What size system does Uniqlo use?
Uniqlo uses alpha sizing (xs to xl with measurements). Alpha sizes with centimeter guidance; check the chart.
How do I convert my size to Uniqlo?
Measure your underbust and bust, get your size in your usual system with our calculator, then map it across with the size converter before checking the official Uniqlo chart.