J.Crew Sophie Open Front Sweater Blazer H2180 Black, Size PXS

From J.Crew: Our latest layering invention, thanks to perfect-weight merino wool that you can wear on its own now, or underneath coats later. Oh, and it covers your bum. Merino wool. Item H2180. The color is Black. The reviews think this sweater runs slightly large. Size PXS is about 26” from shoulder to hem and 18.5” from pit to pit (across the back)