Concept u/k short trench coat

Lightweight nylon trench coat from concept uk (?) in a very cool colour: green with a kind of gold shimmer. Length: 33" Pit to pit: 19 " It seems the tag gives every size but the North American one. I would call it a small/medium. I'll list as M. N.B. the bottom button needs a stitch or two before it gets lost! A lovely coat!