On my last queen size quilt I did on my frame my batting was only about 1-2inches bigger then my top(due to the top ending up bigger then I anticipated and my batting was bought onsale) sooo I tried it, through the quilting process my batting crawled a little bit each time I moved my quilt up on my frame...needless to say by the time I got to the end I was 3 inches to short on my batting :'( agh, soo from now on if its going to be a close call I'll always buy a bigger prepackaged batting size haha...live n learn I guess...