Have trouble sleeping? Figured I'd pass this tip on to you... cuz I care. If you sleep on your side, you need a thicker pillow than if you sleep on your back or stomach. You know that. Why? Because the space between your shoulder and neck (side sleeping) is greater than the space between your neck and the bed (sleeping on your back or front). So what to do? The answer is the Buckwheat pillow. My Chiro turned me on to this more than a couple of years ago, and it works. It's a pillow literally full of buckwheat husks. So it's HEAVY. But if you prop it up... it stays! If you flatten it out... it stays at the flatness you set and doesn't get thinner as the weight of your head compresses the normal foam or feathers in pillows. Now you're probably thinking a pillow full of dried wheat husks is going to be noisy... and it is. But your brain very quickly learns to tune it out, and you won't even notice it. The pillowcase has a zipper on one end so you can remove or add husks as you see fit. Over time, it says the husks will break down from continually rubbing against each other and should be replaced, but I've had mine over 10 years, and it's the same as when new. So the husks last a LONG time.
So... if you're having trouble finding a pillow that fits whether you sleep on your side or on your front/back... the Buckwheat pillow may be the answer. Check it out. I love mine and won't use anything else. Just thought I'd pass this tidbit on.