Is wearing a midi (skirt/dress) forbidden?

A woman's attire in front of non-mahram men must fulfill the legal conditions for covering the 'awrah. However, in front of her mahram relatives, and when there is no fear of temptation (fitna), she may uncover her head, arms, and feet. In front of her fellow Muslim women, it is permissible to uncover what is above the navel and below the knee. In front of her husband only, she may wear anything without limit, provided that it does not involve imitation of men or polytheist women.