The dress is an XS but it fits oversized. I'm typically a small or medium and this still looks oversized on my 5'2" frame. The stock photos are to show the fit/drape of the dress. From the Aritzia website This is a billowy dress with balloon sleeves, a tiered skirt and lace details. It's made with lightweight, drapey fabric. Content: 100% viscose Care: Machine wash