Dimensions: 84” L x 72” W
A California king mattress is the longest standard size on the market—perfect for tall sleepers who don’t want their feet hanging off the edge. It’s slightly narrower than a standard king size mattress but makes up for it with four extra inches of length. Ideal for couples, especially if one or both are tall, or anyone who prioritizes legroom over width.
Best for: taller couples, sprawling sleepers, or anyone who needs extra legroom.
Room size: A California king mattress fits best in a large primary bedroom, ideally at least 12 x 12 feet.
Learn more about Casper mattress sizes in our Mattress Size Guide.