I purchased this jacket for myself, 6ft, 13stone male. I ordered a size large which turned out to be much too big. The length and sleeve length were fine but the waist/chest was massive. It has a removable padded inner lining and even with that in the jacket was still much too big.
I returned it and asked for a size small, as looking at the size guide, small/medium/large all had similar dimensions except the waist/chest. The size small fits perfectly even with inner padding.
You'll do well buying this jacket but if you want my advice, buy at least 1-2 sizes smaller than you would normally get.