Unko Mens Linen Soild Color Short Sleeve Shirt Without Inside Cotton+Polyester Fiber Made and ship from China, so size is smaller than US size US Medium=China X-Large:Length:28.74"(73cm), Chest:40.16"(102cm), Shoulder:17.48"(44.4cm), Sleeve length:8.27"(21cm) US Large=China 2X-Large:Length:29.53"(75cm), Chest:41.73"(106cm), Shoulder:17.95"(45.6cm), Sleeve length:8.46"(21.5cm) US X-Large=China 3X-Large:Length:30.31"(77cm), Chest:43.31"(110cm), Shoulder:18.43"(46.8cm), Sleeve length:8.66"(22cm) US 2X-Large=China 4X-Large:Length:30.71"(78cm), Chest:44.88"(114cm), Shoulder:18.90"(48cm), Sleeve length:8.86"(22.5cm)