If you are trying to ask how much is the material that goes on certain chairs. It varies on the color and pattern that you want your chair covered in. Usually the material is for gliders. Those also classified as rockers so if that's what your question is, it can vary just call the store and ask to speak to a Furniture representative and they can help you with choosing a certain cloth for your chair.
I don't have cloth rocking chairs.
Thanks! Your answer is awaiting moderation.