My mattress is about 18 thick, and it is the first deep pockets sheet to fit  I have tried three others. It's an odd color (the product supplier's picture is an accurate representation of the color), but it is acceptable, especially given the sheet's perfect dimensions and secure fit. Even after a few nights' sleep, sitting on the edge, etc., it is still securely in place. It is not the smoothest sheet I own, and it's a mite wrinkly, but other reviewers say it'll get softer with more washings, so I'm willing to wait, and really, it wasn't scratchy or unpleasant. Also, I tend to sleep hot, and this sheet is comfortable.