KING Size Top Benefits

  • Ultimate Space for Couples (and Pets!):Spread out in style—King size is perfect for couples who need room or share their bed with kids or pets.
  • Best for Master Bedrooms:Fits beautifully in larger spaces and gives a luxurious look and feel.
  • Enhanced Sleep Independence:Less partner disturbance—great for light sleepers or those with different sleep schedules.
  • Premium Sleep Experience:Pairs especially well with the Luna Luxury 14" or Flow 14" for maximum comfort, motion isolation, and edge-to-edge support.
  • High-Resilience, CertiPUR-US® Certified Foams:Safe, breathable, and pressure-relieving materials.
  • Individually-Wrapped Pocket Coils:Targeted support + motion isolation for deeper sleep.
  • Reinforced Edge Coils:Full-surface support with no sagging or slipping.
  • Cooling Covers & Foams:From breathable knits to airflow foam systems—stay cool all night.
100-Night Trial
94% Customer Satisfaction
10-Year Warranty
10K 5-Star Reviews
Our guarantees
100-Night Trial
Your 100-night trial begins the day your mattress is delivered to your doorstep. If you decide it isn't a perfect fit for you within the first 100 nights, we'll have it picked up and issue a refund. (Awesome, right?)

We do ask all customers to spend at least 21 nights on their mattress before starting a return or exchange so their bodies have enough time to adjust to Anmiz's unique feel + support!
94% Customer Satisfaction
94% Customer Satisfaction
10-Year Warranty
If there's something wrong with your mattress, we'll replace it for up to 10 years, starting from the date of original purchase. 

This warranty is valid only if the purchaser uses the product for personal consumer use. The warranty no longer applies after any resale, whether new or used. Original, dated proof of purchase by the original purchaser; official warranty document; and law tags are required to make a warranty claim.
10K 5-Star Reviews
10K 5-Star Reviews

Best 10-Inch King Size Mattresses for Comfort & Support

Hush Hybrid Mattress
Hush Hybrid Mattress
Budget-conscious sleepers who want breathable comfort and reliable support for everyday use.
Flow Classic Hybrid Mattress
Flow Classic Hybrid Mattress
Sleepers seeking a balance of pressure relief, motion isolation, and enhanced edge support for deeper, more restful nights.
Luna Luxury Hybrid Mattress
Luna Luxury Hybrid Mattress
Discerning sleepers who want luxury-level comfort, full-body ergonomic support, and advanced cooling for the ultimate sleep experience.

Best 12-Inch King Size Mattresses for Comfort & Support

Hush Hybrid Mattress
Hush Hybrid Mattress
Budget-conscious sleepers who want breathable comfort and reliable support for everyday use.
Flow Classic Hybrid Mattress
Flow Classic Hybrid Mattress
Sleepers seeking a balance of pressure relief, motion isolation, and enhanced edge support for deeper, more restful nights.
Luna Luxury Hybrid Mattress
Luna Luxury Hybrid Mattress
Discerning sleepers who want luxury-level comfort, full-body ergonomic support, and advanced cooling for the ultimate sleep experience.

Best 14-Inch King Size Mattresses for Comfort & Support

Hush Hybrid Mattress
Hush Hybrid Mattress
Budget-conscious sleepers who want breathable comfort and reliable support for everyday use.
Flow Classic Hybrid Mattress
Flow Classic Hybrid Mattress
Sleepers seeking a balance of pressure relief, motion isolation, and enhanced edge support for deeper, more restful nights.
Luna Luxury Hybrid Mattress
Luna Luxury Hybrid Mattress
Discerning sleepers who want luxury-level comfort, full-body ergonomic support, and advanced cooling for the ultimate sleep experience.

The Perfect Night’s Sleep: Why Our King Size Mattresses Are Worth It

Why Choose a King Size Mattress?

A King Size mattress is all about luxury, space, and comfort. If you’re looking to upgrade your sleep experience, this is the mattress for you. It offers plenty of room for couples to spread out without disturbing each other. Whether you share your bed with a partner, a pet, or just love extra space, a King Size mattress gives you all the room you need for a peaceful night’s rest.

Trusted by 1 Million American Sleepers*
9 out of 10
Anmiz customers would recommend Anmiz to their family and friends.
9 out of 10
Said their Anmiz mattress helped reduce overall aches, stiffness, soreness, and/or discomfort.
9 out of 10
Back pain sufferers said their Anmiz mattress helped some or a lot.

Certifications & Awards

  • CertiPUR-US® certified foams
  • GREENGUARD® Gold certified
  • Congress of Chiropractic State Association Seal of Approval
  • Endorsed by the American Chiropractic Association
  • Best Cheap Mattress
  • Best Mattress For Back Pain
  • Best Mattress In A Box
  • Most Comfortable Mattress
  • Best Mattress For Side Sleepers
  • Best Mattress For Back Sleepers
Rest easy with a risk-free 100-night trial plus free shipping and easy returns.
More Details
100-Night Trial
Your 100-night trial begins the day your mattress is delivered to your doorstep. If you decide it isn't a perfect fit for you within the first 100 nights, we'll have it picked up and issue a refund. (Awesome, right?)

We do ask all customers to spend at least 21 nights on their mattress before starting a return or exchange so their bodies have enough time to adjust to Anmiz's unique feel + support!
Free Shipping & Easy Returns
Get your mattress shipped straight to you at no extra cost – with complimentary white-glove delivery available on select mattresses. If you don’t love your mattress, just contact a Sleep Genius to confirm eligibility and arrange a return.

To be eligible for a return, you must be within the 100-night trial period and have had the mattress for at least 21 days; the mattress must also be clean and undamaged. You will be refunded the full mattress price minus the value of any discount, interest accrued, and transportation charges.

For questions about products purchased at a retail location, please contact the store directly.

King Size Mattresses FAQs

1. What is a king-size mattress?

A king-size mattress is one of the largest available mattress sizes, typically measuring 76 inches in width and 80 inches in length. It provides ample space for two people to sleep comfortably, with extra room for those who move around at night or prefer more space.

2. What king-size mattress options does Anmiz offer?

Anmiz offers a range of king-size mattresses, including the Flow Classic Hybrid Mattress, Luna Luxury Hybrid Mattress, and Hush Hybrid Mattress. Each mattress is designed to meet various sleep needs, from providing pressure relief to supporting back and lumbar health, while also offering motion isolation for undisturbed sleep.

3. How does a king-size mattress compare to a queen-size mattress?

A king-size mattress is 16 inches wider than a queen-size mattress, measuring 76 inches wide by 80 inches long. While both options provide ample space, a king-size mattress is ideal for couples who need more space or individuals who like to spread out during sleep.

4. Is a king-size mattress suitable for small bedrooms?

While a king-size mattress provides plenty of space for comfort, it may be too large for smaller rooms. It's best for rooms that are at least 12 feet by 12 feet or larger. Be sure to measure your space before purchasing a king-size mattress to ensure it fits comfortably.

Still have questions?

Our Sleep Specialists are dedicated to helping you find the mattress of your dreams. Give us a call or chat with us now.

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2,000+ Reviews
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2,000+ Reviews
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10,000+ Reviews