What size is a king single mattress?

A king single mattress is 107 cm wide x 203 cm long. Mattress depth varies by brand and model.

What's the difference between a king single and a single mattress?

The difference between a king single and a single mattress is that a king single mattress is 15 cm longer and wider. A standard single mattress measures 188 cm long and 92 cm wide. A king single measures 203 cm long and 107 cm wide.

Is a king single smaller than a queen mattress?

Yes, a king single is smaller than a queen mattress. While a king single is the same length as a queen or king mattress (203cm), a queen mattress is almost half a metre wider.Here are the measurements of a king single and queen mattress: King single 107 cm wide x 203 cm long; Queen 153 cm wide x 203 cm long. Depth will vary.

Is a king single mattress good for adults?

A king single mattress is a great option for adults and adolescents who require extra legroom. It provides all the length of a queen or king mattress, but with a narrower profile that takes up less floor space.

What are the advantages of a king single-size mattress?

The advantages of a king single-size mattress include affordability, manoeuvrability and adaptability. The same length as a queen, but less expensive, a king single mattress can see your child or teen through multiple growth spurts without the need to replace their bed – making the size a popular and cost-effective option.Easier to handle than larger mattresses, a king single is also ideal for guest bedrooms, student accommodation and smaller rooms where floor space is at a premium, but legroom is required.

Find the MATTRESS for You

King Single Mattresses

Enjoy roomy comfort with an Ecosa king single mattress. With added legroom and width for larger solo sleepers, our king single mattress in a box delivers convenience and comfort.

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Single Mattresses

Long Single Mattresses

Double Mattresses

4 product(s)

Ecosa Mattress

Full Price

$1,085

Member Price

$868

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Essence Mattress

Full Price

$740

Member Price

$592

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TrueFirm Mattress

Full Price

$960

Member Price

$768

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Ecosa Kids Mattress

Full Price

$620

Member Price

$496

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100-Night TrialFree returns if it is not the one
Ergonomic Spine AlignmentZoned support and zero partner disturbance
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EssentialsEssence Mattress

EssentialsTrueFirm Mattress

EssentialsEcosa Mattress

PremiumPure Mattress

PremiumCoolComfort Mattress

PremiumSenseHD Mattress

LuxuryCielo Mattress

LuxuryAeroLux Mattress

4.6 · 1,784 reviews

Best for budget- and eco-conscious sleepers who want springs.

Full Price

From $710

Member Price

From $568

Shop Essence

4.8 · 684 reviews

Best for anyone who wants a truly firm bed, with three levels to choose from.

Full Price

From $870

Member Price

From $696

Shop TrueFirm

4.7 · 26,345 reviews

Best for couples and anyone still working out their firmness.

Full Price

From $960

Member Price

From $768

Shop Ecosa

4.7 · 2,106 reviews

Best for side sleepers who want pressure relief with a spring feel.

Full Price

From $1,350

Member Price

From $1,080

Shop Pure

4.5 · 279 reviews

Best for hot sleepers who want airflow and a medium feel.

Full Price

From $1,960

Member Price

From $1,568

Shop CoolComfort

5.0 · 1 reviews

Best for side sleepers who love the deep hug of memory foam.

Full Price

From $2,120

Member Price

From $1,696

Shop SenseHD

Best for sleepers who want a soft Euro Top over firm, cooling support.

Full Price

From $2,490

Member Price

From $1,992

Shop Cielo

4.8 · 13 reviews

Best for back sleepers who love a plush, hotel-style feel.

Full Price

From $4,000

Member Price

From $3,200

Shop AeroLux

Highlight

Budget-Friendly

Truly Firm Support

Our Best Seller

Serious Comfort

For Hot Sleepers

Ultra-Adaptive Comfort

Soft Top, Firm Support

Cloud-Like Luxury

How It Feels

Even & Supportive

Stable & Firm

Contouring & Supportive

Supportive & Breathable

Cool & Airy

Weightless & Contouring

Extra Comfort

Soft & Cloud-Like

Firmness

Plush, Medium or Firm

Medium-Firm to Extra-Firm

Plush to Firm

Medium-Plush to Medium-Firm

Medium

Medium-Plush

Medium or Firm

Medium-Plush or Medium

Height & Sizes

Height

22cm

25cm

29cm

28cm

25cm

37cm

40cm (with pillow top)

Single

Long Single

King Single

Double

Queen

King

Super King

California King

What’s Inside

Spring

Precision pocket springs
Bio-based memory foam
5 support zones

Hybrid

Precision pocket springs
Open-cell latex foam
Firm support foam
5 support zones

Memory Foam

Contouring memory foam
Open-cell memory foam
5 support zones

Hybrid

Precision pocket springs
Micro coils
Natural latex foam
Open-cell memory foam
Cooling gel memory foam
7 support zones

Hybrid

Precision pocket springs
FlexMatrix airflow grid
Copper-infused foam
Open-cell memory foam
5 support zones

Memory Foam

Ultra-adaptive KineticaFoam™
Breathable support foam

Hybrid

Super-soft air memory foam
Cooling gel memory foam
Micro coils
Adaptive memory foam
Transition memory foam
Stability memory foam
7 support zones

Hybrid

Precision pocket springs
Contouring memory foam
Gel memory foam
7 support zones
Plush down-blend pillow top

Cover, Care & Warranty

Washable cover

Edge support

Allergy & skin-friendly

Free mattress protector

Warranty

15-Year Limited Warranty

10-Year Limited Warranty

Mattress Firmness Scale

Our mattress range is expertly designed to suit your comfort preference- with options ranging between Plush and Extra Firm that offer the ideal balance of comfort and proper spinal support.

Extra Plush

Plush

Medium

Firm

Extra Firm

Ecosa

(Adjustable)

2 Edition

Essence

Pure

(Adjustable)

2 Edition

SenseHD

Cielo

AeroLux

(Adjustable)

CoolComfort

TrueFirm

(Adjustable)

Kids

Join 100,000 happy customers

My new mattress is so unbelievably comfortable.

I wake up fresh and with energy. I'm not waking up to my partner rolling over either! The washable cover is such a bonus feature.

Alix R.

Verified buyer

Best sleeps ever!

Never realised just how bad my sleep was until I got the Pure. It took a couple of weeks to adjust to it but now I sleep so well I can’t believe I have waited so long to get one. No sore back from a mattress that was too soft. Best buy, totally recommend.

Kim A.

Verified buyer

Sleep Like a Dream on the Pure Mattress by Ecosa!

I recently had the chance to try out the Pure Mattress by Ecosa, and let me tell you, it's been a game-changer for my sleep! I love that I can adjust the firmness to my liking, so I can customise my sleep experience.

Brendan D.

Verified buyer

Highly recommendable!

Best mattress I've had so far and I've had a few... My wife was a bit unhappy first but after a while she agreed and we both sleep well and wake up without back pain. Also: best customer service I've had so far. Ecosa certainly goes way beyond selling stuff - seems to be a concept that makes great products.

Thorsten D.

Verified buyer

Extremely happy with this mattress

Extremely happy with this mattress - tried the medium initially but swapping to the medium-firm has been perfect. I have been receiving chiropractic treatment for 15 years and I finally feel like my back has the right combination for excellent sleep (with my Ecosa pillow).

Kathryn F.

Verified buyer

Very comfortable and so easy

Very comfortable and so easy to swap between medium and medium firm. Also despite its weight the bed can still be shifted without too much effort.

Lindie N.

Verified buyer

Mattress arrived within stated time

Mattress arrived within stated time frame. Easy to unpack, instructions great. The mattress it’s self is very comfortable and we both love it. The ability to trial is wonderful and the reason we gave it a go. Very happy with our purchase , highly recommended.

Lou H.

Verified buyer

Frequently Asked Questions

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A King Single Mattress: Ultimate Versatility

Measuring 107 cm x 203 cm, a king single mattress is 15cm wider and longer than a standard single mattress – making it ideal for guest bedrooms and growing bodies.

We offer a roomy king single in most mattress styles, with varying firmness and support for different sleep styles.

Relax With A King Single Mattress In A Box

Make moving day easier with a king single mattress in a box. A dream to manoeuvre up stairs and around corners, it also keeps your new mattress fingerprint-free.

Our Bestselling King Single: The Ecosa

With three adjustable firmness levels, our original foam mattress in a king single is an Ecosa family favourite. It also comes as a long single mattress – 15cm longer than a standard single.

Essence: Our Eco-Friendly King Single Mattress

Featuring bio-foam and zero-waste pocket springs, our affordable Essence Mattress delivers targeted, eco-friendly support.

Ecosa Kids King Single Mattress: Support For Growing Bodies

Our Kids Mattress in a king single is the perfect size for transitioning from childhood to adolescence.

Give Your King Single Bed The Royal Treatment

Want to keep your king single bed mattress in tip-top condition? It’s easy with our King Single Mattress Protector – waterproof and machine-washable for stress-free cleaning.

And if your mattress has seen better days, our King Single Mattress Topper adds an instant layer of softness.

Sleep Easy With Our 100-Night Trial!

When you buy a king single mattress from Ecosa, you can rest assured you’re buying the best. However, we still provide an extended trial to ensure it’s right for you.

If your new mattress doesn’t tick all your boxes in the first 100 nights, we arrange a stress-free return and refund. Simple.