How Korean women's sizes work
Korean women's clothing is labelled with doubled digits: 44, 55, 66, 77 and 88. The numbers are codes, not measurements. They come from the national clothing size standard published in 1981, which was built around a reference woman 155 cm tall with an 85 cm bust: her size was written "55", one digit from her height and one from her bust. Each step adds about 5 cm of height and 3 cm of bust, so 44 meant 150 cm and 82 cm, and 66 meant 160 cm and 88 cm.
The standard was later revised to print real measurements, so a current Korean tag often reads 85, 90 or 95 (the bust in centimetres) or S, M, L, sometimes with a height such as 85-160. The old numbers survive because shoppers still think in them, and most stores list both. You will also see "55반" (55 and a half), an informal half step between 55 and 66, and "Free size", which usually fits a 55 to a 66.
How to measure yourself
Use a soft tape over light clothing and keep it level. Bust: around the fullest part of the chest. Waist: around the natural waistline, where you bend sideways. Hip: around the fullest part of the seat, about 20 cm below the waist. Height: without shoes. Note everything in centimetres; the converter also accepts inches.
Korean product pages also list 실측, the garment measured flat: 총장 (total length), 가슴단면 (chest width across the front, half the circumference), 어깨 (shoulder) and 소매 (sleeve). Double the 가슴단면 figure to compare it with a US chest measurement, allowing a few centimetres over your bust for ease. Comparing 실측 with a garment you already like is the most reliable guide.
Converting Korean sizes to US sizes
This chart gives an illustrative label comparison: 44 = US 0, 55 = US 2–4, 66 = US 6–8, 77 = US 10–12 and 88 = US 12–14. The US ranges for 77 and 88 overlap, so a US 12 can correspond to either row. Labels and cuts vary; use these comparisons only as a starting point.
The second table is a generic US body-measurement reference in inches and centimetres. It is separate from the label comparison: a Korean 66 row covers 88–92 cm bust, while individual US reference sizes also have their own ranges. Enter your own bust in the measurement mode to compare both systems and check the seller’s garment dimensions before buying.
Why brands differ, and how to shop
Korean brands cut slimmer, with shorter sleeves and bodies, than most US brands, and the same 66 can differ by several centimetres between shops. US brands drift too: vanity sizing has made today's US 8 larger than one from decades ago, while fast-fashion labels often run small. Treat the result as a starting point:
- At the top of a Korean range, or for a relaxed fit, size up (66 instead of 55).
- Compare the seller's 실측 table with a garment you own rather than trusting the label.
- Scan reviews for 정사이즈 (true to size), 작게 나왔어요 (runs small) and 크게 나왔어요 (runs large).
- Free size is usually cut for a 55–66; read the 실측 if you are a 44 or a 77.
- Favour sellers that accept exchanges on international orders.
Quick reference: the most searched sizes
Using the label convention above:
- Korean 44 = US 0 (XS), bust 78–82 cm
- Korean 55 = US 2–4 (XS–S), bust 83–87 cm
- Korean 66 = US 6–8 (S–M), bust 88–92 cm
- Korean 77 = US 10–12 (M–L), bust 93–97 cm
- Korean 88 = US 12–14 (L), bust 98–102 cm
- Free size has no fixed measurement; compare the seller’s garment dimensions.