Shop KIng Mattresses


For those who like to  have plenty of room for a slumber party that includes the whole family if needed, our King Mattresses provide the widest sleep surface we offer. (Also referred to as Standard King or Eastern King.)

King Sized Mattresses are offered in a split format so you can share your bed, not your mattress. See All King Mattresses Here
King size mattresses size chart

We Offer this size in a split format so you can share your bed, not your mattress.
Rise & Shine With Direct Mattress
From restless partners to pacing pets — long nights happen. Wake up refreshed with DMS and GOT Certified Material’s unmatched motion cancellation and experience brighter mornings.

A Mattress Made for Big Dreams
Air Flow Foam Material isn’t like ordinary memory foam — or any other material on Earth. Originally created by NASA to cushion astronauts during space travel and perfected by our sleep Specialists for sleep, our technology provides comfort, even distributing heat and cold away from the body

A standard King size mattress is 76” wide and 80” long. We recommend avoiding this size unless your room is at least 12×12 square feet. This is a perfect option for couples who sleep with their kids or pets and want more room for themselves.

If you want to compare this to other options, a King is the same as 2 Twin XL beds.

King sized Bed with The Onyx King Sized Mattress

Playfull on a King Mattress From Direct Mattress

Compare Tempur Breeze Lux to Onyx 14.5 KIng sized Mattresses

 Cool-Touch Fabric-Special conductive yarns actively move heat through the fabric to maintain a cool, comfortable sleeping environment all night long

Save Now Automatic Discounts at Checkout. Plus Financing For All Credit Types, Even No Credit Check If Needed

* Graphene Memory Ace-Regulates temperature for deeper sleep by drawing excess heat away from your body while absorbing pressure so you can sleep undisturbed without tossing and turning

* Graphene Memory Foam-Highly conductive graphite memory foam offers cool and supportive sleep with little to no motion transfer

* Hi-Definition Transition Layer-Enhances the buoyant, weightless feel of the mattress

*High Density Orthopedic Support Core-Pressure relief and contouring is delivered with our stable high density, Certipur-US certified foam core to provide support and comfort.

*Trizone Comfort Layers-The top and bottom thirds are slightly softer that the center third. The center third is firmer to account for most of our weight placement.

*CertiPUR-US Certified Foam -High-end high-density soy based foams 1.5lb - 1.8lb foams from the best foam suppliers in the nation

*20 Year Warranty

*Proudly Made in the USA- Onyx Ice by Diamond Mattress in Rancho Dominguez, California

*Cool Touch Temperature Regulating Fabric

*2" Graphene Hyperconductive Cool Memory Foam

*Certipur HD Comfort Layers

*Patented Zoned Nested Coil Support System

*Foam Encased HD Edge Support

The Only Thing Discount About Us Are The Prices!

The Best King Mattresses At The Best Prices 866-787-5337

Fido Approved, 120 Night Sleep Trial No Questions Asked and We Pay The Shipping to Your Home and Even If You Return Your Mattress Under The 120 Night Sleep Trial