But just as with a mattress, there is no one-size-fits-all pillow, and so much depends on personal preference (do you want to sink into a pile of down feathers, or would you rather be propped up ...
If a bed-sized pillow is too large ... Natural feathers and down pillow filling can be added to your garden compost pile. Sprinkle the feathers on top and give the pile a turn with a pitchfork ...
This is a no-brainer, but the larger the bed, the more pillows you can pile up. But also remember: the more pillows, the less ...