I use every scrap of batting. If it is too small to piece it goes into a pillow case size bag that I made out of pillow ticking. Larger scraps get shredded with my hands. I just pull them apart to make them fluffier. My friend always has these pillows for sale at her rummage sale, and they are the first to sell. I've taken several to the food pantry, as some people who need food, need bedding also.
One more thing: someone mentioned lining this pillow ticking with batting so the lumps are felt less. Good idea!