What Size is a California King Mattress (and Why it’s Worth the Extra Room)?

July 02, 2025

What Size is a California King Mattress?

A California king mattress is 72 inches wide by 84 inches long—making it the longest standard mattress size available. It’s ideal for taller individuals or anyone who enjoys a little extra legroom without sacrificing luxury.

If you’re searching for a bed that combines spacious comfort with organic, eco-friendly materials, understanding what size a California king mattress is is just the start. This oversized option offers more than just generous dimensions—it delivers a whole new level of sleep quality.

Why Size—and Sustainability—Matters

When it comes to choosing the right mattress, size matters. But so does what’s inside. Eco-conscious consumers want a mattress that not only fits their space and sleep needs, but also aligns with their environmental values.

If you’re considering a California king, you may be asking, what size is a California king mattress, and is it worth the upgrade? The answer lies in both its dimensions and its ability to transform your bedroom into a sustainable sanctuary of comfort.

Understanding the Dimensions of a California King 

Let’s get specific: what size is a California king mattress?

A standard California king measures 72 inches wide by 84 inches long. That makes it:

• 4 inches longer than a standard king (which is 76 inches wide by 80 inches long)
• 4 inches narrower than a standard king

This unique sizing makes the California king ideal for:

• Taller sleepers (over 6 feet)
• Couples who share the bed with pets or young children
• Bedrooms that are longer than they are wide
• Anyone who simply prefers more legroom while sleeping

And when paired with the right materials—like organic latex, GOTS-certified cotton, and natural wool—a California king becomes more than just spacious. It becomes a healthier, more sustainable sleep choice.

Real-Life Sleep Scenarios: Who Benefits Most from a California King?

Imagine this: You and your partner both love to spread out while sleeping. Maybe one of you is 6’4”, and the other often ends up with your dog curled up at the foot of the bed. In this case, knowing what size a California king mattress is helps solve a practical problem: space and comfort.

Here’s how it plays out:

• Your feet no longer hang off the edge of the bed.
• You both have ample space to move without disturbing each other.
• Your pet has plenty of room without cramping yours.
• You still maintain a sleek, balanced look in your bedroom, especially if your room is long and narrow.

And when your California king is made with non-toxic, eco-conscious materials—like in Eco Terra’s handcrafted mattresses—you gain peace of mind along with extra inches.

Choose Organic Comfort in California King Size

Now that you know what size a California king mattress is, the next step is choosing one made with comfort and sustainability in mind.

The Eco Terra Hybrid Latex Mattress is available in California king size and handcrafted in the USA using:

• GOTS-certified organic cotton
• Natural, breathable latex
• A supportive fabric-encased coil core
• No chemical adhesives or polyurethane foams

If you’re ready to upgrade to a larger bed that aligns with your eco-friendly lifestyle, the Eco Terra Hybrid Latex Mattress in California king size may be exactly what you’re looking for.

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Also in Eco Terra's Healthy Sleep Blog