I've been meaning to buy a MyPillow for a while now, but unsure which firmness I should get.

There is the guide, but due to periodic neck issues I often wake up with a headache. Currently I sleep with one of those foam ergonomic pillows with the dip in it, but will sleep with no pillow for a stretch as the neck issue typically lasts for a short time.

Any who, now that I've TMI'd yall, hoping to find out how thin is the Premium/Giza Elegance "least fill", or "medium" for the Classic.

Thanks!

Edit: Not so much the thinness per say, but more how much it compresses when you lay your head down to sleep.