I would lay the batting out and give it a gentle stretch if you need a bit extra. It should stretch to give you the extra inch or so you need. I do this all the time when I cut from the roll of batting and my cut was wonky

If you are going to use spray adhesive to quilt then the overage doesn't need to be that much. I usually have 1-2 inches overage when I quilt because I don't want to waste; however, what's really beneficial when using the spray adhesive is that you can use all your scrap pieces of batting. Just lay them side by side and don't lap the edges over each other. I found this to truly be a blessing since I keep most of my batting scraps. I am now using them on baby quilts and lap quilts since most of the small pieces are easy to use with the spray. This has saved me a boatload of money since I don't need to keep buying batting for small projects and there is truly no waste. Just another way to spend my money wisely. Good luck and please post pics when you are done.

Great information, I wouldn't have thought about gently stretching the batting :D:D:D

yes....I buy bolts of batting now and I save all my scraps. If I'm getting towards the end of the bolt I just start sewing my scraps together otherwise I use them for smaller projects too. If my kids want to make something, I'm not cringing at them cutting off the bolt and just let them use the scraps. We've even made lots of little coasters with the scraps. Save it all. Just butt the ends up to each other and zig-zag over then to hold them together. :)

I agree.

I have several patterns that give a finished measurement of twin quilt being 72x90, 67x92, 75x87 and a book that lists sizes with different drops. I guess that I thought that a twin was a twin and that twin batting should fit most twin quilts I quess that I should use batting size that matches the quilt measurements instead of "twin" or "queen" or "crib" as stated on the package. I just keep on learning!