do you have a size chart for the hemp...
do you have a size chart for the hemp hoodlamb long hoodlamb jacket??
There is one for the Hemp Hoodlamb Droptop Hoodlamb Jacket that should work for this jacket as well.
The measurements between the short and long are actually a little different. The manufacturer's website has a measurement chart at http://shop.hoodlamb.com/img/sizecharts/LO_GARMENT10.jpg.
The measurements are across the flat garment, so I'd double them to get the measurement around and then add a few inches to your body measurements to leave room for things like clothes and breathing.