they work the best they can as i have a 24.5” chair back, a bit short but since chairs have a wood seat i added a 2” cushion from hobby lobby and used lien tape to keep fixed, good shortcut.Otherwise, they are very nice and the fabric is very soft and seems quality. Haven’t washed them yet so I don’t know about all that fuzzy balling people are talking about on other products.  This size was the closest I could find to my chair back height.