First of all these are larger than described. The actual size is 28x20x5. I believe that makes them a queen size pillow, not standard. I was pleased that they were larger than described, but it means they don't fit a standard pillowcase. I will need to order larger sized pillowcases because of the thickness and the extra length. I like my pillows to slide easily in the case and these have to be forced by hand in the case, which means the density increases because they are so tightly placed in the case. I love the fact that they can be reversed based on the kind of support needed. The memory foam side is the firmer side, and the gel foam fiber is softer. It is like getting two pillows in one. Either way, it is a great pillow and well worth the cost.