Please excuse my ignorance as I am very new at this and wonder? why are you joining batting? Is it because you need a larger piece? I have never purchased batting yet so have a great deal to learn so would appreciate your answers. Not having enough batting of a certain size or using up smaller pieces of batting seems like a logical answer to me but then I am a very literal person (gets me into lots of trouble) and this may be just too simple of an answer on my part.