Beautiful midi dress

NWOT beautiful blue and black floral design cap sleeve midi dress. Armpit to armpit measures approximately 20 inches. Please note*The size on the tag is marked xxxlg, However, it actually would fit more like probably a large and I listed as a large. I bought it from a boutique online. It falls to about the middle of the calf. I’ll be glad to take more measurements if requested. Zips up the back.