It is Chinese size and smaller than the USA size.
Please check the size carefully.
US Medium=China Large:Length:31.10"(79cm),Bust:39.37"(100cm),Sleeve Length:25.59"(65cm)
US Large=China X-Large:Length:31.50"(80cm),Bust:40.94"(104cm),Sleeve Length:25.98"(66cm)
US X-Large=China 2X-Large:Length:31.89"(81cm),Bust:42.52"(108cm),Sleeve Length:26.38"(67cm)
SportsX Men's Modern Open-Front Drape Cable Long Sleeve Knit Cardigan Tops - TFRK7EX82