Korean bra sizing, like most European and Japanese systems, uses centimeters for band measurements and a letter for the cup.

The cup size is determined by the difference between your underbust and your full bust. In the Korean system, a G-cup usually indicates a difference of approximately 25 cm . International Size Conversions

Best Global Bra Size Converter 2026 – US, UK, EU, and Japan

Because sizing varies by country, a Korean 65G is equivalent to several other common international labels: