The covers are very light weight which is good in that they also have ties for the legs (for windy days) The main purpose I purchased them is to keep the sun off the chairs when not in use. The website is not clear on dimensions however and we purchased larger ones than we really needed but kept them anyway. They will serve the purpose nicely for what I purchased them for. It sure would be nice if the website gave more info regarding chair fit and how it is determined.