I tried it on, I'm a 48-50 in most shirts (non-geller) and tried on a 48 and it fit - a little blousy, slightly dropped shoulders. Sizing seemed pretty flexible so ymmv - 50 probably would've worked too, maybe better
fabric is silky mostly in appearance; it's actually 100% cotton, and has a crispness to it. but the first night I wore one of my photographer shirts out I had over 5 people commenting on my "silk" shirt, no joke. best of both worlds — get that louche look without the difficulty of maintenance of silk!
Thanks OccultaV. Repped.