The size is Chian size, it is smaller then USA size, pleae choose 2 sizes up! Any question please don't hesitate to contact us, will help you to solve problem.
US Small=China Medium:Length26.77"(68cm),Chest40.94"(104cm),Shoulder20.87"(53cm),Sleeve20.47"(52cm);
US Medium=China Large:Length27.95"(71cm),Chest42.52"(108cm),Shoulder21.65"(55cm),Sleeve20.87"(53cm);
US Large=China X-Large:Length29.53"(75cm),Chest44.09"(112cm),Shoulder22.44"(57cm),Sleeve21.26"(54cm);
US X-Large=China 2X-Large:Length25.98"(66cm),Chest45.67"(116cm),Shoulder23.62"(60cm),Sleeve21.65"(55cm);
US 2X-Large=China 3X-Large:Length26.77"(68cm),Chest47.24"(120cm),Shoulder24.41"(62cm),Sleeve22.44"(57cm);

• Imported
• China size, smaller than USA size. Please view the product description size measurement before you buy.
• Any questions, please contact us firstly, will give you a satisfied solution.
• We serve our customer with our best products & services.Feel free to contact us with any comments and suggestions!
• US 2X-Large=China 3X-Large:Length26.77"(68cm),Chest47.24"(120cm),Shoulder24.41"(62cm),Sleeve22.44"(57cm)

Imported