Jessica Holbrook black line type jacket long

Jessica Holbrook black jacket made from linen type material. Fully lined, single button, long sleeve, with shoulder pads and two front pockets. No size tag, my dress form is a 14/16 and it was a bit big on her. I estimate this to be an 18 but please use the measurements to confirm fit. Flat measurements armpit to armpit 21" waist 21" shoulder to hem 31" shoulder to cuff 24" shoulder to shoulder rear 16"