Filson, an upscale outdoorsy / Buy it for life- or we will replace it or fix it garment and bag manufacturer based in Seattle, Washington is famous for their cotton twill. This is a casual/ workshirt, made out of a slightly less heavy duty twill than their famous rugged twill briefcase. It is still quite thick and a great layer for fall and winter. Size small, but could also fit someone who wears a medium. Measurements: 21.5 p2p 28” back 22” arm.