I opted for the 9 cm pillow because my physical therapist told me that a flatter pillow is completely sufficient for me. My bed is quite soft, as it is supposed to take rather low. The decision 9cm was absolutely right. I am very happy with the pillows, had no longer the complaints as before. One can test very well, what level you need where you quite straight on a wall is (shoulder blades and feet on the wall). Now you can measure how far the cervical spine is still away from the wall. But do not lean your head against the wall, but look beautiful straight I also hope you will find your real pillow.
