I had originally ordered a size 12 as well as a size 10, as I was unsure which one would fit best. The size 10 was a better fit so I returned the larger size.
I did however notice that there were a few ridge (puckered) lines close to the pocket on the R/H side (when trying on the jacket). So I sent for another size 10, which was subsequently better. I had no problem returning the original size 10 or the size 12 jackets.