Do you save the 'trimmed away' part of your batting after you baste or quilt your top?? I do and it seems perfectly natural since I'm a scrap quilter. Working with pieces is second nature to me. If you can piece fabric together, you can piece batting scraps, especially the 100% cotton batting. And did you know that same batting can be ironed, or pressed, using a medium high heat? Nothing to be afraid of if its all cotton. Yesterday I made a batting for another UFO of mine. I match up what seems to be the right sides of batting scraps. I use about a half inch seam, and back tack at both ends. Then I press that seam open. Once it's open I top stitch down each side of the pressed open seam. This is the wrong side of the batting.
And this is the right side. I used a lavender thread in the bobbin on purpose for these pictires. You'll learn to kind of match similar lengths or almost squares. It's not really any differet than making a backing from assorted pieces.
I laid out the backing(on the table...it's only a 60" square top) put the newly made batting on it and then carefully smoothed the top into place and pinned it. I debated machine quilting this one but decided to tie it instead. Next time you see it, it will be a finished UFO....#5 since we began the challenge!! I'm off to another eye dr. today, wish me luck!!!
2 hours ago