Even at their cheap price, they are not worth it. On opening package, there were a lot of thread ends coming from edging seams- had to cut them all off. My mattress is 13 inches thick & the fitted sheet bairly fits- the fabric is thin, & after being used for less than a week, there are pills forming where my feet rest, making the sheet feel rough. Granted, my feet move a lot, but less than a week for pills to form!! Really, their only redeeming feature is that they are soft, for the moment. Do not buy these sheets- I would have been much better off spending twice as much & getting sheets that would last.