Size US 6 or a medium. Four very faint marks on the front of the dress (all pictured) they are only noticeable under harsh lighting and if you look very closely. The style of this dress is very fitted, the mannequin is about a size 2 so it is loose in the photos because the size isnt correct for the mannequin This dress does not have any stretch or give and this brand tends to run slightly small. I usually wear a size 4 or small but have found that i need a six in this brand and style to fit my hips comfortably Tags- Designer, Luxury, Revolve, Vacation, Holiday, Resort, Date Night, Girls Night Out, Bachelorette, Birthday party, Cocktail Event, Gala, Retrofete, Poster Girl, Cult Gaia, The Attico, Area NYC, Nue, Reformation, Heron Preston, Frankies Bikinis, Dion Lee, IRO, Cami NYC, Valentino, Wedding Guest, Formal, Miami, Las Vegas, New York City, Chic, Classy, Statement, Feminine, Femme, Frwd, SSENSE, Runway, Holiday Party, Christmas, New Years Eve, Bridal, Party, Clubbing, Club, Black Tie, Rave, Festival, Coachella, Prom, Homecoming, Dance, Mini, Micro, Maxi, Gown, Beach, Spring Break