One problem I find these days with fitted sheets is they all tend to fit the new thicker mattresses and I still have the old fashion thickness mattress. I'm starting to run out of fitted sheets that actually fit. My mattress is still in good condition as I keep a mattress cover on it and flip it every 6 months as suggested years ago. I love the new lines of sheets but their fitted sheets are the pits for me. I have a full size and a queen size mattress with this problem. May have to use the suggestion and go with flat sheets all around.