I use pieced odds and ends from my other quilts for my baby and medium lap sized donation quilts. I use W & N. I bought a roll at the start of the pandemic and made about 3 quilts per month for a year. Still have plenty of batting to go. I would shift my pieces to one side or the other leaving a long "scrap" of batting that I can then piece with the iron on batting tape. Works well. I tend to quilt a bit heaver on children's quilts, more frequent washing, and have never had any complaints from friends or family about those heavily used quilts. They don't know the batting is pieced and I am not telling.
