Women are depicted in revealing dress in the media and the depictions have costs such as objectification. Objectification theory explains that women in Westernized cultures are looked at, evaluated, and potentially objectified by others. Accordingly, objectifying gaze (by others) evokes self-objectification which has effects such as habitual body and appearance monitoring. According to the theory being objectified by others precedes self-objectification, which suggests that objectification by others could be more prevalent than self-objectification and potentially just as harmful. Researchers have found that self-objectification and other-objectification can be induced by revealing dress manipulations that vary in tightness or body coverage. We studied Halloween costumes as a site for objectification of others. In Study 1, 124 pairs of men’s and women’s Halloween costumes were content analyzed. Women’s costumes were significantly more revealing than men’s in tightness and body coverage. Since sexual objectification in the media is assessed by the presence of revealing dress in media depictions, we reasoned that women’s revealing Halloween costumes could be sexually objectifying. In Study 2, 295 participants rated women wearing revealing or non-revealing costumes in an online experiment. Women wearing revealing costumes were sexually objectified by participants. Although men rated costumed women higher on the sexually objectifying traits than women, both men and women objectified the costumed women in the revealing dress condition. Dress researchers may wish to apply objectification theory to re-interpret and explain early research on revealing dress.