King Size Mattresses

Approx. Dimensions: 76” X 79.5” / 6,042 sq in / 42 sq ft

A King-size is the widest offering at 76 inches. A Queen is 60 inches wide and a California King is 72 inches wide.

Want to learn more about the different sizes we offer, check out our mattress size guide.

The measurements of a regular King are approximately 76 inches in width and 79.5 inches in length. The measurements of a California King are a bit longer and not as wide, the dimensions are approximately 72 inches wide by 83.5 inches long.

King Size Dimensions: 76″ Wide x 79.5″ Long

California King Size Dimensions: 72″ Wide x 83.5″ Long

Read more about the King vs California King differences, here.

Actually, no they don’t. Two Twins put together fall approximately 5 inches short, but two Twin XLs put together are the same dimensions as a King.

A Split King is made up of two Twin XLs and measures the same as a standard King size but are generally bought for split adjustable bed frames or couples who have different sleep preferences and would like two different types of surfaces to sleep on.

A good King on average can range anywhere from $800 upwards to $5,000 depending on the features and materials used to make it.

It’s all about your own personal shopping preference. Some people are online shoppers and that is what they are most comfortable with while others are more of an in-person shopper where touching, feeling and seeing the product is the only way they want to shop. So it really is all about which way you prefer to shop. There really is no right or wrong way to shop for a new bed. If you are, however, the latter, click here to find a Serta store near you.

From innerspring to memory foam to mattress-in-a-box to hybrid mattresses, Serta offers different models that are available in King. Most have different cooling and firmness level options. So no matter your sleep preference and preferred sleeping position, back, stomach and side sleepers alike, Serta has a model that will be perfect for you.

On our website, we ship exclusively within the contiguous United States (lower 48 states). Unfortunately, we do not currently offer shipping to Alaska or Hawaii.

Financing is available directly through our website. We have partnered with Affirm to offer financing or pay-over-time options for our customers. At checkout, you will be given the option to pay through Affirm. If approved, you will be given loan options for 3, 6, or 12 months. All interest is provided up front, there are no hidden fees, and only a soft credit check is done through Affirm's system for approval. After you've confirmed your choice, you will be redirected back to our website to complete checkout.

Affirm only requests a soft credit check for approval, so the credit inquiry won’t affect your credit score. Once you've selected your financing term, you will be redirected back to the website to complete your purchase.

For returns and cancellations, refunds will be processed through Affirm and posted to your Affirm account. Refunds will be processed within 3-10 business days. Keep in mind the interest charge will not be refunded.

Please note that financing through Affirm is not available in West Virginia and Iowa.