What are the dimensions of king-size mattress toppers?

King mattress topper dimensions in Inches: 76 x 80 inches King mattress topper dimensions in Centimeters: 193.04 x 203.2 cm King mattress topper dimensions in Feet: 6.33 x 6.67 feet

What is the best mattress topper for a king bed?

The best mattress topper for a king bed is a latex topper . It's the only material that reliably delivers support, pressure relief, and cooling in one long-lasting package. Memory foam can provide more pressure relief, but it traps heat, off-gasses VOCs, provides less support, and breaks down faster. Latex lasts for many years without sagging, which is rare among other king-size bed toppers. Our organic Latex Mattress Topper comes in multiple firmness and thickness options, so you can match it to how you sleep best.

How many inches thick should a king mattress topper be?

A 2 inch mattress topper makes a subtle change to the feel of the bed. Good for lightweight sleepers and anyone who just wants a slight cushioning effect without dramatically altering the mattress. A 3 inch mattress topper makes a more noticeable difference and works well for most sleepers. If your mattress is too firm and you want real improvement, this is the right thickness to go with. A 4 inch mattress topper is the most significant change you can make short of replacing the mattress. Best for heavyweight sleepers and anyone whose mattress has lost much of its original feel.

Does a mattress topper really make a difference?

Yes, a good one does. Sleeping on a 3-inch latex topper on a firm mattress feels very different from the first night. The pressure relief at the shoulders and hips is immediate , and the support beneath stays consistent. The difference can depend on your existing mattress, though. A topper on a structurally sound mattress that's just too firm/soft can genuinely transform how the bed feels. A topper on a mattress that's already sagging will feel better for a short while, but the underlying problems will eventually come through.

Are there any downsides to using a mattress topper?

A few worth knowing about before you buy: A topper raises the overall bed height , which can make getting in and out of bed awkward if the mattress is already tall. For older sleepers, this should be factored in. A topper might shift around during the night . A fitted sheet pulled tightly over both the topper and mattress helps with this, and some toppers even come with elasticated corner straps or a non-slip base to keep things in place. A topper adds another layer to maintain . Latex toppers can be spot cleaned and aired out, but you can't throw them in a washing machine. A mattress protector over the topper makes upkeep easier. None of these are deal-breakers, but they're good to know going in so you're not caught off guard.

Can a king-size mattress topper fit on a California king bed?

No, a California king bed is longer and narrower, so a king-size topper won't fit properly. A king topper measures 76 inches wide and 80 inches long, while a Cal king bed measures 72 inches wide and 84 inches long. This 4-inch mismatch in length and width can cause discomfort. If you have a California king mattress, get a California king mattress topper to match.

Will a king mattress topper fit on a queen-size bed?

No, a king topper is 16 inches wider than a queen-size bed, so it'll be too large. Queen beds (60" x 80") require a queen mattress topper .

Is a king mattress topper and mattress pad the same?

No, king mattress toppers and mattress pads aren't the same. A king mattress pad is a soft layer of material (less than an inch thick) that provides light cushioning and protection against spills, sort of like a mattress protector. A king mattress topper is thicker (2-4 inches) than a mattress pad , offering more support along with better cushioning. It can extend your old mattress's lifespan by a few years, which a mattress pad cannot do.

Should I get bigger sheets if I buy a king mattress topper?

Not necessarily a bigger size, but you may need deeper-pocket sheets. A topper adds 2 to 4 inches to the bed's height, and standard sheets with shallow pockets will not stretch far enough to stay tucked under the mattress. Look for sheets with a pocket depth of at least 15 to 18 inches if you're adding a 3- or 4-inch topper. If your current sheets already have deep pockets, they'll likely still work fine. Try them before buying new ones.

Is a latex mattress topper better than a memory foam mattress topper?

Yes. Latex outperforms memory foam in a few key areas. To start with, latex sleeps cooler . Memory foam absorbs and holds body heat, which is a real problem for anyone who sleeps warm at night. Latex lets air move through it and doesn't trap heat the same way. Latex lasts longer . Memory foam starts compressing unevenly within a few years of regular use. Latex can maintain its support much longer, so you won't replace it as often. Latex responds faster . Memory foam has that slow, sinking feel that some people like but others find makes it hard to change positions. Latex pushes back immediately, so moving around in bed feels easy. Memory foam does have one edge: pressure relief. It contours very closely to the body, which is why it's popular with side sleepers. Latex contours well too, but memory foam goes a bit deeper in that regard. If you sleep hot, move around a lot, and want a topper that'll last you many years, latex is the best pick. If deep contouring and a lower price point are the priority, a memory foam topper ain't a bad pick.

What is the best king mattress topper for back pain relief?

The best king mattress topper for back pain relief is a medium-firm mattress topper that's 3 inches thick and made of organic latex foam. It keeps the spine in a neutral position without being so rigid that it creates pressure at the hips/shoulders. Our Latex Mattress Topper is great for back pain, with its 7-zone design delivering the right amount of cushioning across the body. The Egg Crate Mattress Topper is also worth checking out for a good night's sleep. It distributes body weight more evenly across the mattress, relieving pressure buildup at the joints.

What is the best king mattress topper for heavy people?

The best king mattress topper for heavy people is a firm mattress topper , at least 3-4 inches thick. The more you weigh, the deeper you compress the comfort layers, so you need enough material below you to support your spine and prevent the topper from bottoming out. Our firm and extra-firm Latex Mattress Topper is built for this. Dunlop latex is dense enough to handle higher body weights without breaking down, providing more restful sleep long-term.

What is the best king mattress topper for couples?

The best king mattress topper for couples is a medium-firm mattress topper , at least 3 inches thick. Versatility matters for couples, since you have two people with different sleep preferences. A medium-firm latex topper covers most sleep positions and body types reasonably well. Our Latex Mattress Topper is highly versatile. It can be customized to you and your partner's needs, and its 7-zone design supports all your body regions comfortably. Plus, latex doesn't sleep hot and isolates motion really well.

What is the best king mattress topper for my sleeping position?

This list should help you out: Best king mattress topper for side sleepers: Soft to medium | 3-4 inches Best king mattress topper for back sleepers: Medium to firm | 2-3 inches Best king mattress topper for stomach sleepers: Medium to extra-firm | 2-3 inches Best king mattress topper for combination sleepers: Medium to firm | 3-4 inches If you're a lightweight sleeper (under 130 lbs.), go for a softer topper. If you're average-weight (130-230 lbs.), go for the in-between. If you're heavyweight (over 230 lbs.), go for a firmer topper.

What is the best king mattress topper for hot sleepers?

The best king mattress topper for hot sleepers is a perforated latex mattress topper . Unlike memory foam, which absorbs and holds heat, latex actively lets air circulate through it. You're not going to wake up in the middle of the night surrounded by a pool of sweat anymore. Our Latex Mattress Topper is highly recommended for hot sleepers. If you sleep really hot, consider the Cooling Mattress Topper . It's infused with Graphite, which draws heat away from the body better.

King Mattress Topper

Turmerry Organic Latex Mattress Topper on wooden bed frame with perforated latex surface and white pillows in bright bedroom.

7 Zone Organic Latex Mattress Topper

$99.00

Turmerry Graphite Infused Latex Topper rolled and folded showing perforated dark gray surface with soft edges.

7 Zone Cooling Mattress Topper

$299.00

Egg Crate Mattress Topper

$79.00

RV Mattress Topper

$149.00

What Is a King Mattress Topper?

A king mattress topper is a 2- to 4-inch-thick extra layer that goes on top of your king-size mattress, measuring 76 inches wide and 80 inches long. It changes the feel of your mattress without replacing it, making it useful if your bed is new and too firm, or starting to show its age and getting too soft.

King mattress topper atop a king size bed measuring 76 x 80 inches.

It helps to know how a mattress topper differs from the other bedding layers you might add:

A mattress pad is thinner, usually under an inch. It adds a bit of cushioning and is mainly used to protect the mattress from daily wear.

A mattress protector adds no cushioning at all. Its only job is to keep moisture, allergens, and impurities from reaching the mattress.

A mattress topper is the thickest of the three and the only one that meaningfully changes how the bed feels. If comfort and support are the goal, a topper is what you're looking for.

Should You Get a King Mattress Topper?

You should get a king mattress topper if:

Your king mattress is too firm or too soft, but otherwise in good shape. A topper is a faster and cheaper fix than buying a new mattress.
Your king mattress is a few years old and starting to feel less comfortable than it used to. A topper can extend its life without a full replacement.
You're furnishing a master bedroom or a large guest room and want to improve the sleep surface without the cost of a new mattress.
You share a king bed with a partner, and one or both of you have specific sleep needs, like pressure relief or cooling, that your current mattress doesn't fully address.

A topper won't fix a mattress that's already sagging. If you see visible dips on the surface and feel like the support is totally gone, a new mattress is the better choice. But if not, then definitely get a topper.

Get the Best King Mattress Toppers at Turmerry

Turmerry mattress toppers are made with high-quality, GOLS-certified organic Dunlop latex. With benefits like responsive support, pressure relief, cooling, durability, and more, they're the most popular king-size mattress toppers you'll find today.

$Turmerry latex mattress topper placed atop quilted white turmerry mattress, on a wood base in a bedroom.$

Responsive Support & Pressure Relief

Latex responds to your movements instantly, pushing back as you shift positions, and it contours very well to your body, distributing weight evenly across the surface. In addition, our toppers feature 7-zone support, so they're firmer under heavier areas like the hips/back and softer under lighter areas like the shoulders/thighs, ensuring proper spinal alignment and pressure point relief.

Breathable & Cooling Design

Latex has an open-cell structure that lets air move through it freely. Our toppers are perforated to improve this further, so body heat doesn't build up the way it does with memory foam. A great option for anyone who sleeps hot.

Long-Lasting Lifespan

Dunlop latex is dense and resilient. It doesn't lose its shape like cheaper foam does over time. A well-maintained Turmerry latex topper will last you well over 5 years, making it a better long-term investment than synthetic alternatives.

Customizable Firmness & Thickness

Our king-size toppers come in multiple firmness options, including soft, medium, firm, and extra firm. You can also choose the thickness you need, from 2 inches to 4 inches. It's your topper, after all! It should suit how you sleep.

Certified Safety & Quality

Our latex carries several third-party certifications, including GOLS, OEKO-TEX, eco-INSTITUT, FSC, and LGA, ensuring it's tested for both chemical safety as well as durability. It's sustainably sourced and eco-friendly, too. Better for you, better for the planet.

Naturally Hypoallergenic

Latex is naturally resistant to allergens like dust mites, mold, and mildew, making our king toppers a good option for anyone with allergies (or chemical sensitivities).

Free Shipping, Trial, Warranty

Every king mattress topper ships free across the US and comes with a 120-night trial and 5-year warranty, plus reliable customer service and easy returns. That's enough time to know whether the topper is truly working for you. And if it doesn't, we're here to help!

How Latex Compares to Other Mattress Topper Types

See how latex compares to other toppers like memory foam, gel memory foam, wool, feather, down, and down alternative in this table:

Feature	Latex	Memory Foam	Gel Foam	Wool	Feather/Down	Down Alternative
Support	Excellent	Good	Good	Moderate	Poor	Poor
Pressure Relief	Excellent	Excellent	Good	Moderate	Low	Low
Cooling	Excellent	Poor	Good	Good	Moderate	Moderate
Motion Isolation	Great	Excellent	Good	Moderate	Poor	Poor
Durability	5-10+ years	2-4 years	2-4 years	5-7 years	2-3 years	1-3 years
Off-Gassing	None	Moderate-High	Moderate-High	None	None	Moderate-High
Hypoallergenic	Yes	Yes	Yes	Yes	No	Yes
Eco-Friendly	Yes	No	No	Yes	Moderately	No
Cost	High	Moderate	Moderate-High	Moderate-High	Moderate	Low-Moderate
Best For	All Sleepers	Side Sleepers	Hot Sleepers	Temperature Regulation	Softness/Luxury	Budget Buyers

How to Choose the Best King Mattress Topper for You

Consider these factors before you buy a new king topper, and create a checklist so that you know you're getting what suits you:

1. Mattress Condition

A topper improves comfort, but it can't fix a mattress that's already gone bad. If your mattress has heavy sagging and dipping, a topper will just conform to those problem areas, so you'll still feel them. The general rule is: if your mattress is less than 8 years old and still has decent support, a topper is a good investment. But if it's older than that and showing clear signs of wear and tear, put the money toward a new mattress instead.

2. Size

Always make sure your topper size matches your mattress size. If you're not sure of your mattress size, measure it before ordering.

Twin mattress topper for a twin bed (38" x 75").
Twin XL mattress topper for a twin XL bed (38" x 80").
Full size mattress topper for a full bed (54" x 75").
Queen mattress topper for a queen bed (60" x 80").
King mattress topper for a king bed (76" x 80").
California king mattress topper for a California king bed (72" x 84").

A topper that is too small won't provide full coverage, which can lead to discomfort at night. On the other hand, a topper that is too large will be difficult to maneuver and lead to unevenness.

3. Material

Latex is the most durable, supportive material. It's also breathable and pressure-relieving. Memory foam contours closely but traps heat and breaks down faster. Gel foam sleeps cooler than traditional memory foam but shares most of the same durability drawbacks. Wool is durable, temperature-regulating, and even long-lasting. Feather/down toppers are luxuriously soft but offer little support. Down alternative is the most affordable but wears out the quickest.

4. Firmness

Side sleepers need a softer topper to cushion the shoulders/hips. Back and stomach sleepers need a firmer topper to keep the hips level for optimal spine alignment. If you switch between positions through the night, a medium-firm mattress topper is the safest bet. One more thing: body weight also affects firmness. Lighter sleepers need softer cushioning, while heavier sleepers need firmer support.

5. Thickness

Most toppers are around 2 to 4 inches thick. A 2-inch topper makes a subtle adjustment to the feel of the bed without changing the height much. A 3-inch topper makes a bigger difference, especially for couples, making it ideal for those who want meaningful improvement. A 4-inch topper changes the feel by a lot and works best for heavier sleepers. Keep in mind that a thicker topper raises the overall bed height, which might make it harder for older folks to get in/out of bed.

6. Temperature Regulation

A topper that can regulate temperature is a must-have for hot sleepers and couples. Latex and wool are the most naturally breathable options. Latex has an open-cell structure that lets air move through it freely, and perforations improve this further. Wool pulls moisture away from the body through the night and buffers temperature changes, keeping you warmer in winter and cooler in summer.

Gel foam performs better than regular memory foam at staying cool, but it still can't match latex over a full night. Memory foam is the worst option for anyone who sleeps hot, since it retains body heat rather than letting it escape.

7. Motion Isolation & Noise

Motion isolation is essential on a king bed that you're sharing with a significant other. Latex and memory foam both absorb movement very well, so you won't feel your partner shifting around on the same bed. They're also very quiet. Feather/down toppers, on the other hand, shift and rustle with movement, which can wake light sleepers. Avoid those if you're allergic to noise in bed.

8. Budget & Maintenance

The average price for a king mattress topper is around $200 to $500. Latex costs more upfront but lasts longer than memory foam and fiber alternatives, often 5-10 years or more with proper care. Memory foam and gel foam are cheaper to start, but they need replacing within 2-3 years. Down alternative is the most affordable entry point but has the shortest lifespan of the group, just 1-3 years.

On the maintenance side, latex toppers just need spot cleaning (for spills/stains) and regular airing to keep them fresh. Memory foam also needs careful spot cleaning to avoid damage. Wool and down toppers often require professional care. An organic waterproof mattress protector over the topper extends its life, regardless of material, and makes day-to-day upkeep easier.

9. Reviews

Look for reviewers with a similar body weight and sleep position to you and your partner. Someone who weighs 130 lbs sleeping on their side will have a very different experience than a 230 lb back sleeper. Additionally, reviews from people who've had the topper for a year or more give you the most useful picture of how it performs over time, since that's when cheaper materials start showing their flaws.

10. Warranty & Trial

A sleep trial of at least 60 to 90 nights gives you enough time to properly assess whether the topper is working for you, since the body needs a few weeks to adjust to a new sleep surface. For latex, look for a warranty of at least 3 to 5 years, with coverage for premature sagging.