At a Glance:
How to Choose a King Size Mattress
Selecting the Right King Size Mattress Type
Looking for a bed that’s wide enough to sleep with your partner and still feel like you can stretch out? A king size mattress is wide enough to handle multiple sleepers, and you can find one that’s the right firmness level and material for you.
In this mattress size guide, we’ll discuss how wide is a king size bed and compare king size beds to other mattress sizes. We’ll also cover how to choose a king size mattress based on support level, firmness, and construction type–and we’ll recommend our top picks for king size mattresses from Colder’s.
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Shop NowHow Wide is a King Size Bed?
A standard king size bed width is 76” while the length is 80”. However, there are more options than just a standard king size bed. Did you know you can opt for a split king, California king, or even an Alaska king?
A king size bed is actually the length and width of two twin XL mattresses put together, so some brands offer split king size mattresses. A split king allows each sleeper to customize their side of the bed to their specific firmness preference and sleep style. This individualized comfort is especially advantageous for couples with differing sleep preferences or specific health considerations. Additionally, split king mattresses can often be fitted with adjustable bed frames, allowing each sleeper to independently elevate or recline their side of the bed. This feature is particularly useful for individuals with conditions like snoring, acid reflux, or sleep apnea.
Learn More: 5 Most Comfortable Mattress Models
King Size Beds Compared
When you think of bed sizes, you probably think of twin, full, queen, and king off the top of your head. But did you know there are several other sizes, including multiple king size mattresses? Let’s look at a quick comparison of dimensions as displayed in the chart below.
| Mattress Size | Dimensions in Inches (Width x Length ) |
|---|---|
| Twin | 38" x 75" |
Here’s a deeper look at how those sizes compare.
- King Size Bed vs Queen: King size beds are the same length as queen size beds, but they’re 6” wider. These extra inches give you room to spread out and have your personal space during the night. For those who like to sleep with extra pillows or have a restless sleeping partner, a king bed is ideal.
- King Size Bed vs California King: With a California king, you lose 4” of width, but gain 4” of length. A California king is ideal for tall sleepers who don’t want their feet hanging off the end of the bed. Their narrower width also means you might be able to fit a California king bed into a smaller bedroom.
- Alaskan King Bed vs California: An Alaskan king is the widest size available, measuring 108” or 9 feet wide! It can fit up to four adults comfortably and is great for those with a tall or large stature. They’re great for piling on pets or creating an over-the-top, opulent bedroom. However, they’re a less realistic choice for most bedrooms given their large size. A California king is a more practical choice for tall sleepers.
Understanding all of these differences should help you with choosing a bed size that’s right for you.
Learn More: 7 Best Firm Mattresses
How to Choose a King Size Mattress
When you’re considering how to buy a mattress, there are several strategies for narrowing your search. We recommend targeting these three factors: support level, mattress firmness, and mattress type.
By Support Level
Mattress support is crucial for proper spinal alignment. The level of support you need depends on a variety of factors, including your weight, height, and most common sleeping position. For example, heavier individuals and those who sleep on their back and stomach need more support than a lighter individual or side sleeper.
The type of mattress you choose will largely determine the support level. For instance, innerspring mattresses are known for their firmness and bounce, providing robust support ideal for individuals who favor a more rigid sleeping surface. Memory foam mattresses, on the other hand, contour to the body, offering personalized support that cradles pressure points and aligns the spine, making them suitable for those seeking a plush and conforming feel.
By Mattress Firmness
Mattresses range from ultra plush to extra firm, so to determine the firmness level that’s right for you will take into account the same factors that you considered when deciding on a support level. Lighter individuals and side sleepers prefer mattresses on the softer end of the spectrum while heavier individuals and back and stomach sleepers require firmer mattresses. You may also see this range described by a numbering or rating system. The ratings include
- Extra soft/plush (1-2)
- Soft/plush (3-4)
- Medium (5-6)
- Medium-firm (7-8)
- Firm (9-10)
By Mattress Type
King size mattress options include innerspring, pocketed coil, memory foam, gel memory foam, hybrid, pillow top, and Euro top. You may also hear this referred to as mattress construction or material. We’ll dive deeper into each of these options in the next section.
Selecting the Right King Size Mattress Type
There are several king size mattress types, including a king size latex mattress, innerspring mattress, pocketed coil mattress, and more. They all follow the standard king size mattress dimensions of 76" x 80".
There are pros and cons for every mattress type, and each one is ideal for a certain kind of sleeper. For example, memory foam mattresses are better suited for side sleepers while innerspring mattresses are better for stomach sleepers. Keep reading for a breakdown of each type and a recommended mattress from Colder’s.
King Size Innerspring Mattress
Innerspring mattresses are best suited for individuals who prefer a firmer sleeping surface with responsive support. These mattresses, characterized by their steel coil support systems, are ideal for those who enjoy the feeling of sleeping "on" rather than "in" the mattress. The buoyancy and airflow of innerspring designs also make them a great choice for people who tend to sleep hot. Additionally, quality innerspring mattresses provide excellent lumbar support, and can be beneficial for individuals experiencing back pain.
We Recommend: Sierra Sleep by Ashley Chime 8” Hybrid Firm Tight Top King Mattress in a Box
Shop This Sierra Sleep Innerspring Mattress
For a coil mattress that actually contours to your shape, this Sierra Sleep by Ashley Chime innerspring mattress is an excellent choice. Its firm feel is ideal for heavier, taller individuals as well as back and stomach sleepers. It’s also hypoallergenic, so it’s great for those who struggle with seasonal or pet allergies.
★ Features Sierra Sleep Chime Review:
“Comfortable and supportive. I really like this mattress. I was afraid it would be too thin, but it's perfect. I sleep comfortably and would definitely recommend the Chime 8 inch mattress.”
King Size Pocketed Coil Mattress
A pocketed coil mattress is best suited for individuals seeking targeted support and motion isolation. These mattresses feature individual coils wrapped in fabric pockets, allowing them to move independently. This design is particularly beneficial for couples because it minimizes motion transfer, ensuring that one person's movements do not disturb the other. The pocketed coil structure also offers excellent spinal alignment, making it an ideal choice for back pain sufferers and sleepers looking for additional lumbar support.
We Recommend: Restonic Scott Living Ferndale Wrapped Coil Tight Top Firm King Mattress
Shop This Scott Living Wrapped Coil Mattress
Designed by Drew and Jonathan Scott from HGTV’s Property Brothers, this features foam-encased coils as well as medium support foam, gel-infused memory foam, and a cool-to-the-touch quilt covering. This is a great choice for those who want a firm, supportive mattress and may struggle with back or joint pain.
King Size Memory Foam Mattress
A memory foam mattress is best suited for sleepers looking for contouring comfort and pressure point relief from back and joint pain. Additionally, memory foam is known for its ability to minimize motion transfer, making it an excellent choice for couples, ensuring that movements on one side of the bed do not disturb the other. People who suffer from allergies may also benefit, as memory foam is resistant to common allergens like dust mites. Overall, a memory foam mattress is a suitable option for those seeking a personalized, supportive, and motion-isolating sleep surface.
We Recommend: Sierra Sleep by Ashley 10” Memory Foam Medium Tight Top King Mattress in a Box
Shop This Sierra Sleep by Ashley Memory Foam Mattress
This budget-friendly memory foam mattress is made up of layers of foam (memory foam, transition foam, and firm support foam) to provide medium comfort. If you’re trying to find a mattress that works for you and your partner, but you have different preferences, the medium comfort of this mattress might be a great compromise option that suits both of you.
★ Featured Sierra Sleep Mattress Review:
“Worth every penny. Got this for my nephew when we redid his room from full to king. He loves it. He says it's soft enough to lay on for sleep and playing video games, but firm enough to support him riding and turning.”
King Size Gel Memory Foam Mattress
A gel memory foam mattress is best for individuals who prioritize temperature regulation during sleep. These mattresses incorporate gel-infused memory foam, which helps dissipate body heat, keeping the sleep surface cooler compared to traditional memory foam. This cooling feature makes gel memory foam mattresses an excellent choice for hot sleepers or those living in warmer climates, addressing common issues related to overheating during the night. Gel memory foam mattresses provide the same contouring and pressure-relieving benefits as standard memory foam, making them suitable for individuals with joint or back pain.
We Recommended: Sierra Sleep by Ashley Millennium Luxury 14” Gel Memory Foam Cushion Firm Tight Top King Mattress in a Box
Shop This Sierra Sleep Gel Memory Foam Mattress
Overheat and sweat during the night? This gel memory foam king mattress is designed with you in mind. It features charcoal-infused gel memory foam and a green tea-infused support foam base to block moisture and odor so that your mattress stays fresh. It’s also ideal for those with an adjustable king bed frame.
King Size Hybrid Mattress
A hybrid mattress is best for sleepers who seek a balanced combination of support, comfort, and responsiveness. These mattresses feature innerspring coils and foam layers, offering the benefits of both materials. Hybrids are ideal for sleepers who enjoy the traditional feel of innerspring support but also desire the contouring comfort provided by memory foam or latex layers.
This versatile design caters to a wide range of sleep preferences and can address common sleep problems such as back pain, as the hybrid structure provides targeted support to alleviate pressure points. Additionally, the responsiveness of hybrid mattresses makes it suitable for couples, minimizing motion transfer and ensuring a more undisturbed night's sleep. Overall, a hybrid mattress is an excellent choice for those seeking a well-rounded sleep surface that addresses various comfort and support needs.
We Recommend: Scott Living by Restonic Ellis Hybrid Firm Tight Top King Mattress
Shop This Scott Living Hybrid Mattress
This hybrid king mattress from Drew and Jonathan Scott is firm, making it ideal for back or stomach sleepers as well as those between 130 and 230 pounds. Sleepers will enjoy the support of coils and the comfort of layers of foam. It’s also great for those who tend to sleep hot, thanks to Scott Living’s Triple Cooling technology.
King Size Pillow Top Mattress
Pillow top mattresses feature an extra layer of soft padding stitched to the top, providing a cushioned feel that is especially comfortable for side sleepers or those who enjoy a softer sleep experience. Pillow top mattresses can help alleviate pressure points, making them beneficial for individuals with joint pain or those who seek additional support for shoulders and hips. On top of that, the added comfort can contribute to better spinal alignment, addressing common sleep problems such as back discomfort. Overall, a pillow top mattress offers a lavish sleep experience, making it an excellent choice for those who value a plush, cozy feel and desire relief from pressure-related sleep issues.
We Recommend: Sierra Sleep by Ashley M627 Limited Edition Hybrid Plush Pillow Top King Mattress
Shop This Sierra Sleep Pillow Top Mattress
This affordable and plush Sierra Sleep pillow top king mattress is a luxurious option for those who prefer a softer bed. It features a hybrid construction made of wrapped coils and layers of various types of foam, all wrapped in a stretch knit cover. It’s a bit taller than some mattress-in-a-box options, measuring 13” tall, which also adds to its luxurious feel.
★ Featured Sierra Sleep M672 Review:
“Very comfortable. Reasonable price. Would buy again.”
Learn More: Check Out Our Favorite Restonic Mattress Models [Brand Guide]
All in all, if you have the space for a king mattress, we highly recommend buying one for the added space is provides you and your sleep partner. If you’re on the search for the right one, Colder’s can help you find the perfect match! Our wide selection of affordable and quality mattress brands means every type of sleeper can find a king mattress for their needs. Stop by one of our four locations to test out mattresses in person today!
FAQs
How wide is a king size bed?
The standard width of a king bed is 76” wide.
How many inches is a king size bed?
A standard king size bed measures 76” wide and 80” long.
How many people can a king size bed fit?
A king size bed can comfortably fit two people, but you could sleep up to three or even four people in a king bed, especially if some of the sleepers are children.
Why Trust Colder’s?
Since 1942, we at Colder's pride ourselves on offering value, selection, and service. Serving Southeastern Wisconsin with four showrooms that stock quality name-brand furniture, appliances, and mattresses, Colder’s is sure to house exactly what you are looking for. And if you can't find it on our floors, chances are, we can order it for you. As a local, family-owned company, we are always doing our best to provide the highest value at the lowest cost to everyone who walks through our doors.
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Shop King Size Mattresses at Colder’s
Don’t put off happiness — and shop mattresses online for unbeatable prices at Colder’s. Our friendly experts are always happy to help you answer questions like how wide is a king size mattress and more, whether you call us at 414-476-1574 or use our online chat feature. Better yet, stop by one of our Colder’s locations in West Allis, Oak Creek, Delafield, and Grafton, Wisconsin to touch, see, feel, and experience home products that fulfill your dreams. Visit us today!
Learn More: How to Shop for a New Mattress Online: Our Definitive Buying Guide