For back sleepers, it is generally recommended to choose a pillow that provides proper support to maintain the natural curvature of the neck and spine.

Back sleepers may need a flatter pillow, to keep your head and neck in alignment.

Back sleepers typically benefit from a medium-firm pillow that strikes a balance between softness and support. This type of pillow provides enough cushioning to be comfortable while still offering adequate neck support.

Remember, personal preference also plays a role in choosing the right pillow. It's important to try different options and adjust loft and firmness based on your comfort needs and the level of support that feels best for your back and neck.

For stomach sleepers, it's generally recommended to choose a pillow that is soft, thin, and low lofted. Stomach sleeping can potentially strain the neck and spine, so a pillow that doesn't elevate the head too much is preferred - or no pillow at all. A pillow under your stomach and pelvis may help prevent back pain.

Look for a pillow with a low loft or thickness to prevent excessive elevation of the head and neck. This helps maintain a more neutral position for the spine.

Remember, it's essential to prioritize comfort and support while ensuring the alignment of the neck and spine. Stomach sleepers may even consider sleeping without a pillow or using a very thin pillow to allow the head and neck to stay closer to the mattress surface. Experiment with different pillow options to find the one that helps you maintain a comfortable and aligned sleeping position.