based on what I read it said to go up 1 or 2 sizes, however I should have probably stuck to my usual size and ordered a US small/Asia XL/L because I ordered a size up (US medium/Asia XXL) and it was to big all over,I had to give it to my sister who wears a medium but it's a pretty top and the gemstoned neckline is awesome with the pretty white chiffon.