What's happened to normal depth ones, I'm fed up with fitted sheets that are too deep so don't sit taught on the bed, loads of creases and bagginess.
I've just changed the bed and dragged out an old sheet from years ago, it doesn't match anything, but at least it fits.
I tried to buy new sheets recently - deep, untra deep, extra deep... 30cm seems to be the minimum. My mattress is only a couple of years old and barely 8 inches - and perfectly comfortable.
And before anyone suggests it. I don't want to make it deeper by getting a hotter-than-hell foam memory topper.