Asia Size Unit is runs samll,please go up 1 size than you normally wear on U.S Size, If you are not sure about your size, please refer to the size chart listed below
US XS=China M:Length:47.24"(120cm),Bust:46.46"(118cm),Shoulder:17.32"(44cm),Sleeve Length:22.83"(58cm)
US S=China L:Length:51.18"(130cm),Bust:50.39"(128cm),Shoulder:18.11"(46cm),Sleeve Length:23.62"(60cm)
US M=China XL:Length:55.12"(140cm),Bust:54.33"(138cm),Shoulder:18.90"(48cm),Sleeve Length:24.41"(62cm)