"The Haunted" ghost costume from Forum Novelties features layers of ethereal white tulle. You can also buy it on Amazon.
This creepy Night Shadow men's ghost costume includes the top hat and freaky mask. It's also available on eBay.
This tattered Haunting Spirit costume could work for both men and women. It also can be purchased through Amazon.
For girls, here's the Midnight Ghoul costume. You can also find it on Amazon.
This Graveyard Nightgown costume is soft and flowy.
The Haunting Beauty costume is tattered and gauzy. It's also sold on Amazon.