It is Chinese size and smaller than the USA size.
Please check the size carefully.
US Small=China Large:Length:26.77"(68cm),Bust:39.37"(100cm),Shoulder:15.35"(39cm),Sleeve Length:24.02"(61cm)
US Medium=China X-Large:Length:27.17"(69cm),Bust:40.94"(104cm),Shoulder:15.75"(40cm),Sleeve Length:24.41"(62cm)
US Large=China 2X-Large:Length:27.56"(70cm),Bust:42.52"(108cm),Shoulder:16.14"(41cm),Sleeve Length:24.80"(63cm)