Labelled size 14 USA. Usually you add 4 to get the UK size equivalent, which would make this a UK 18. Pit to pit measures 21 inches, shoulder to hem 29 inches. Note, this is quite a longline jacket. Best to measure a current garment of your own in a similar style to make sure this blazer is the right fit for you.

Several small holes/nicks/pulls, nothing huge - please see photos.