We use this product in a classroom for students with sensory aversions to cover the harsh florecent lights int eh classroom. They work okay-I would prefer them to dim the light a bit more, they don't seem to alter the light as much as I would have liked. They come in a one size fits all, and unfornatly I have found them to be about an inch to short both in length adn width. I would prefer the design to have thick magnets and the fabris to be larger. Okay product overall-an easy adn inexpensive attempt at making a classroom more sensory appropriate.