Addictive 2 piece set, free size, silk/poly blend, worn once,excellent condition

This is a free size set, but in my opinion it would fit mid range, 10,12,14,16. Please check measurements and ask questions. The back elastic of the pants is very stretchy. It measured 13 inches flat, and 19 inches fully stretched. The legs are open to the waist. The rise is 12 inches. The inseam is 27 inches. Pit to pit is 22 inches