Cotton On Size Chart
Australian fast fashion · women's
Cotton On is an Australian brand using AU/UK numeric sizing from 4 to 24, with an alpha overlay from 3XS to 5XL, and a centimetre-native chart. A size 10 (Small) fits a 90cm bust, 72cm waist and 98cm hip. The useful thing to know about Cotton On is that it treats AU and UK numbers as identical (an AU 10 is a UK 10), and publishes a single unified women's chart, so there is no UK offset to worry about. Cotton On's own guidance is to choose the larger size when you fall between two, because many of its tops, tees and dresses are cut on the relaxed, casual side. The brand also carries one of the broader size ranges on the high street, running to a 24. As a high-volume secondhand brand, Cotton On's tags are reliable; measure the garment flat against the chart and lean to the larger size for fitted styles.
Cotton On uses AU/UK numeric sizing (4–24) with an alpha overlay (3XS–5XL), and publishes an official AU/US/EU conversion. Its chart is centimetre-native.
Cotton On body measurements
| Size | Letter | Bust (cm) | Waist (cm) | Hip (cm) |
|---|---|---|---|---|
| 6 | 2XS | 80 | 62 | 88 |
| 8 | XS | 85 | 67 | 93 |
| 10 | S | 90 | 72 | 98 |
| 12 | M | 95 | 77 | 103 |
| 14 | L | 101 | 83 | 109 |
| 16 | XL | 107 | 89 | 115 |
Cotton On international size conversion
| AU | US | UK | EU |
|---|---|---|---|
| 6 | 2 | 6 | 34 |
| 8 | 4 | 8 | 36 |
| 10 | 6 | 10 | 38 |
| 12 | 8 | 12 | 40 |
| 14 | 10 | 14 | 42 |
| 16 | 12 | 16 | 44 |
How Cotton On fits
Cotton On treats AU and UK numbers as identical and cuts many tops, tees and dresses on the relaxed side. Its own guidance is to choose the larger size when between two — the brand also runs one of the broader size ranges on the high street.
Cotton On sizing — frequently asked questions
Is Cotton On AU sizing the same as UK?
Yes — Cotton On uses a single unified women's chart where the AU and UK numbers are identical, so an AU 10 is a UK 10 with no offset. The official conversion maps that to a US 6 and an EU 38.
Does Cotton On run big or small?
Cotton On cuts many of its tops, tees and dresses on the relaxed, casual side, and its own size guide recommends choosing the larger size when you fall between two. For a closer fit on a fitted style, measuring the garment flat against the chart is the safest check.
What is a Cotton On size 10 in cm?
A Cotton On size 10 (Small) fits a 90cm bust, 72cm waist and 98cm hip on the brand's centimetre-native chart. Cotton On carries a broad range from AU 4 up to AU 24, so extended sizes follow the same grading.
Found your size? Shop Cotton On secondhand on Bushpop.
Browse the shop →Last verified: June 2026. Source: cottonon.com.