The largest of the four common pillow sizes, a king pillow measures 20 by 36 inches. People who often move around while they sleep or those who simply prefer more surface area often find that a king pillow is a good fit for them.

Fact

Throughout their lifespan, humans go from having 300 bones to 206 bones.

Myth

A hard mattress is better for your back.

A common belief is that the harder the mattress, the better it is for your back. But while your spine has a natural curve to it, the optimal sleeping position is to have your spine as close to that natural curvature as possible. Those with back problems need to scour the web for a diverse range of mattress reviews, and they might find out that a memory foam mattress or pillow top mattress is the right mattress for them.