ive used sheets w/o a problem.. sometimes i really just want it for the pattern !! lol..
if its a sheet set, cut off the elastic and you can use it for another backing and the pillow cases can be undone/cut and a new cuff can be added to match the quilt to be used to 'gift' it in and after they receive- they get a wonderful matching pillowcase !!!.. Sounds like a win win to me..