Although any cloth diaper cover can be used atop a fitted diaper, the pull - on or side snapping styles of cloth diaper covers provide a fuller coverage and less
bulk at the waistline.
If you like a full skirt, waist stays are really helpful in cinching the waist and streamlining
the bulk at the waistline from all of that ruffling.
Angel, you could make a sewn - on elastic casing, as in this tutorial http://sewing.about.com/library/sewnews/qa/aaqa0102a.htm but it will add a lot of
bulk at the waistline.