I ordered a set of sheets that were labeled "King/California King". In hindsight, I should have known that those two mattresses are very different sizes, and that one size would not fit both. However, since the price was so good, I took a chance. However, the fitted sheet does not fit at all. On two corners, the sheet doesn't hit the actual corner of the mattress, so the fabric just hangs. The sheet didn't come over during sleep, however, it doesn't lie properly and looks bunched up when the bed is made. I am disappointed that they are selling this particular set as if it will fit both size mattresses.