The description states that these are made of cotton, so I was disappointed to discover that they are a cheap vinyl. There's nothing rigid to help the bags keep their shape or to protect dishes, except the cardboard dividers in the case intended to store teacups. The sizes are useful for small-to-average-size dainty China, but I have a set of thick, beefy stoneware that I wanted to store, so overall this set is useless for my purposes. If all you want to do is keep dust off your China, this will work. It will not protect dishes from breakage.