I have seen the little girl's "pillowcase dress" patterns, but I need one for an adult. I know a pillowcase will not fit me, but I am looking for another way to make it look like the little girl's dress.
If the top part of a child's dress doesn't fit, but the skirt part does, you can cut off the blouse portion, sew up the back part of the skirt, hem the waist area, insert elastic and make it into a skirt.