Light Blue+Gray Short Sleeve Cashmere top•gift too

Beautiful light blue and gray shirt sleeve Cashmere sweater, size small, by Perry Ellis. Pristine condition. The tag is missing that says the size. My friend who is a true small tried it on and it fit her perfectly. The measurements are 20" in length~18" across bust~4" arm opening+10.5" across bottom. All measurements taken w sweater laying flat. There is no seam at the shoulder~it is a low key dolman sleeve.