Korean Clothing and Shoe Sizes Explained (2026): What 95, 105, 66 and 260 Mean, 'Free Size', US/UK/EU Conversion, the Big-Size Problem, and Where to Shop — Musinsa, Dongdaemun, Uniqlo, ABC-Mart — Size Converter

Korean clothing labels use three systems at once — chest centimetres, a women's number scale from the 1970s, and international letters — and shoes are in millimetres, which is why a foreigner's first Musinsa order is often the wrong size. This part decodes the numbers with a converter, explains "free size" and the big-size problem, and lists where to shop and how the tax refund applies.

The three systems

Men's and unisex tops carry a number that is the chest in centimetres, in fives: 90 ≈ S, 95 ≈ M, 100 ≈ L, 105 ≈ XL, 110 ≈ XXL. Two warnings: the letter mapping is the brand's, not a standard, and Korean garments are cut slimmer through the chest and shorter in the arm than Western ones of the same chest number — most foreigners size up once, tall or broad ones twice. Women's labels use 44 / 55 / 66 / 77 / 88 (≈ XS / S / M / L / XL), a scale defined by a 1970s national standard from a bust of 85 cm and height of 155 cm as "55"; brands increasingly print S/M/L or the chest number, and much of the fast fashion is free size (프리사이즈) — one size, roughly 55–66, cut generously in the shoulder and tight everywhere else. Shoes are in millimetres of foot length, 5 mm steps, the same for men and women: 250 mm = US men's 7 / EU 40, 270 mm = US 9 / EU 42.5; measure your foot on paper and add 5–10 mm. Trousers are in inches of waist (28–36, occasionally cm), one leg length, hemmed free in most shops in ten minutes.

The big-size problem

Korean retail stocks the middle of the Korean distribution: men's up to 105, sometimes 110; women's to 66 or 77; shoes 230–280 mm. Above that the choice shrinks to specialist 빅사이즈 shops (online mostly — search 빅사이즈 on Naver), Uniqlo's XL–3XL online range, the big Musinsa Standard stores, ABC-Mart and Nike for shoes to 300 mm, Costco for basics, and the foreigner-oriented shops in Itaewon. Women over a 77 and men over a 42 waist should expect to order online and try on at home. Bras are sold in cm bands and Korean cup sizes that run small; underwear and socks are fine.

Where to shop

Musinsa (무신사): the online fashion platform Koreans under 40 use, with a global app and site in English shipping abroad, and Musinsa Standard stores (its own basics label, Uniqlo-priced) expanding toward 60 stores by the end of 2026 — Hongdae, Gangnam, Seongsu, Myeongdong, and now the regional cities. Uniqlo Korea: everywhere, the widest size range in mainstream retail, tax-free counters. Dongdaemun (동대문): the wholesale-retail towers — doota, Migliore, apM, Hello apM — open from 10:30 to 5 am with thousands of small stalls; cash gets a better price, sizes are Korean and free-size heavy, trying on is limited, and the fun is the hour after midnight. Department stores (Lotte, Shinsegae, Hyundai — The Hyundai Seoul in Yeouido is the showpiece) for brands, with seasonal sales (Part 6) and instant tax refund desks. ABC-Mart and Nike/Adidas flagships for shoes; Kream for sneaker resale at verified prices; Daiso for socks, slippers and basics under ₩5,000; the Ssamzigil and Insadong area for handmade and hanbok-inspired; and the Hongdae–Yeonnam streets for the independent labels.

Tax refund and cards

Chains, department stores, Uniqlo and most Dongdaemun malls are registered tax-free shops: ₩15,000 per receipt, passport, instant refund up to ₩1,000,000 per purchase, otherwise the airport kiosk — the rules are in the tax refund guide. Small Dongdaemun stalls are cash businesses that do not refund; foreign cards work everywhere else. The next part is when to shop: the four Olive Young weeks, the department-store sales, Korea Sale Festa and the Black Fridays, in one 2026 calendar.