I’ve found a commuters answer in a trench coat. Behold this ‘Neutral zone’ polyurethane coated water resistant trench, while the name may be neutral the lining is anything but. Appears unused. 
Pit to pit 21inches/53cm

 Waist 18inches/45cm

 Hips 19inches/48cm

Total length 37inches/94cm

Sleeve length under 20inches/51cm

Sleeve 25inches/63.5cm

Polyvinyl