Off the shoulders tunic dress size 1X

Black and off White Casual All Over Print Shirred Tunic Off the Shoulder Half Sleeve Flounce Sleeve Natural Straight Knee Length Regular Fit Non-Stretch Woven Fabric 100% Polyester New without tags, purchased the wrong size. I love it but it’s too big for me. The dress did not have any tags when I purchased it online. Model is Wearing: 1XL Height: 173.0 / 68.1 Bust: 105.0 / 41.3 Measurements: Armpit to armpit approximately is 18.5 inches before any stretch. It stretches up to 23 inches approximately C 8