Designer Kenn Sporn did a series of limited edition rain coats for Wippette in the 1980s. I happened to find one in very good condition in Python print with a power cut (and shoulder pads) similar to what Balenciagia is serving us these days.
Depending on desired fit XS/XL

Bust 28inches/71cm

Waist 25.5inches/65cm

Hips 26inches/66cm

Sleeve length 18.75inches/47.5cm

Underarm 19inches/48cm

Total length 47inches/119cm

100 percent vinyl.