Marks and Spencer Una Single Breasted Jacket

The Marks and Spencer website pictures attached are as close as I could find to match my jacket; however, the jacket I listed for sale is mid-thigh length and not waist length as shown in the sample picture. The size is technically 16 but it has NEVER fit like that size. I would say it is more of a size 12 fit. I wear medium to large tops and size 10 pants and it is a somewhat loose fit on me. It all depends on the width of your upper body/shoulder area. I hope the measurements below help. I am choosing to list it as a size 12 because I know it would not fit a size 16. Flat measurements in inches: underarm to underarm = 21 1/2 underarm to bottom hem = 19 shoulder/neck area to bottom hem = 28 underarm to wrist = 17 shoulder to wrist = 25