Smartwool Women’s Ultralite Green Rain Coat Jacket with Wool Size Medium

Smartwool Women’s Ultralite Packable Green Rain Coat Jacket with Wool Size Medium Gorgeous green colour with grey wool details Excellent preowned condition Pit to pit 20.5” Length ( underarm to bottom side hem) 17” * tagged as a size small, however I find it fits more like a medium. Please review approximate flat lay measurements. Could probably comfortably fit a small or a medium