According to your own preferences, determine the size of the buttonhole
Size details: US Small=China Medium:Waist:33.07"(84cm),Hip:41.73"(106cm); US Medium=China Large:Waist:33.86"(86cm),Hip:42.52"(108cm); US Large=China X-Large:Waist:34.65"(88cm),Hip:43.31"(110cm); US X-Large=China XX-Large:Waist:35.43"(90cm),Hip:44.09"(112cm); US XX-Large=China XXX-Large:Waist:36.22"(92cm),Hip:44.88"(114cm);