I traced my old torn raincoat that I’m about to throw away. It is one size only and large enough to fit all adult, so no need to take any body measurement.
It may look ill fitting, but that just how it is – to make it as simple and cheap as possible yet functional. This also help with realism. Alternatively, you can use any coat block.
Raw detailing footage here.
Full scale SVG diagram is available to download from the attachment.

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