King Size Mattresses - Low Prices on Top Brands

Excellent

73,091reviews on

Superking Mattresses6' x 6'6" / 180cm x 200cm King Size Mattresses5' x 6'6" / 150cm x 200cm Double Mattresses4'6" x 6'3" / 135cm x 190cm Small Double Mattresses4' x 6'3" / 120cm x 190cm Single Mattresses3' x 6'3" / 90cm x 190cm Small Single Mattresses2'6" x 6'3" / 75cm x 190cm European Size Mattresses

Shop by Type

Pocket Sprung MattressesIndividual, responsive springs Standard Sprung MattressesOpen coil and Miracoil springs Memory Foam MattressesMoulds to your body shape Hybrid MattressesSprung support with foam comfort Latex MattressesNatural support & pressure relief Gel MattressesDesigned for a cooler sleep Natural & Organic MattressesBreathable and premium comfort

Orthopaedic Mattresses Hypoallergenic & Anti-Allergy Mattresses Eco Mattresses Kids Mattresses Pillow Top Mattresses Zip & Link Superking Mattresses Rolled Mattresses Next Day Delivery Mattresses

Shop by Firmness

Extra Firm Mattresses Firm Mattresses Medium Firm Mattresses Medium Mattresses Soft to Medium Mattresses

Need help?|What Mattress Firmness Is Right for Me?The Best Mattress for Each Sleeping Position

All Mattresses

Beds

Shop by Size

Superking Beds6' x 6'6" / 180cm x 200cm King Size Beds5' x 6'6" / 150cm x 200cm Double Beds4'6" x 6'3" / 135cm x 190cm Small Double Beds4' x 6'3" / 120cm x 190cm Single Beds3' x 6'3" / 90cm x 190cm

Shop by Type

Bed Frames Divan Beds Storage Beds Ottoman Beds Sofa Beds TV Beds Kids Beds Next Day Delivery Beds Guest Beds Headboards

Shop by Brand

Silentnight Elle Decoration Novo Jay-Be Birlea Vogue LPD Flintshire Furniture Friendship Mill

Shop by Material

Wooden Bed Frames Upholstered Bed Frames Metal Bed Frames

Need help?|Bed & Mattress Size Guide Bed Buying Guide

All Beds

Bedding

Pillows

Memory Foam Pillows Latex Pillows Natural Pillows Hollowfibre Pillows Gel Pillows Cooling Pillows Hypoallergenic & Anti-Allergy Pillows

Duvets

4.5 Tog Duvets 7.5 Tog Duvets 10.5 Tog Duvets 13.5 Tog Duvets 15 Tog Duvets

Mattress Protectors

Waterproof Mattress ProtectorsProtection against spills and accidents Hypoallergenic & Anti-Allergy Mattress ProtectorsProtects against allergens and dust mites Quilted Mattress ProtectorsA stylish and comforting finish Cooling Mattress ProtectorsProtection and cooling in one

Mattress Toppers

Memory Foam Mattress ToppersComfort tailored to your body shape Gel Mattress ToppersExtra pressure relief and cooling comfort Natural Mattress ToppersNaturally breathable with plush fillings Hypoallergenic Mattress ToppersExtra comfort and allergy protection

Blankets

Weighted BlanketsSoothing weight to promote relaxation Electric BlanketsKeep warm and cosy in the colder months

Need help?|Pillow Buying Guide Duvet Buying Guide All About Mattress Toppers

All Bedding

Sale

Black Friday Sale - Save up to 60% off*

Clearance

Discounted end-of-range-products

Brands

Need help?|What Mattress Firmness is Right for Me?Bed Buying Guide Pillow Buying Guide

Your Basket

Your basket is empty :(

Why not browse our product ranges?

Mattresses Beds Pillows Duvets Mattress Protectors Mattress Toppers

Free delivery to most locations

100-night mattress trial

Old mattress removal service

Black Friday Sale - Save up to 60% off*

View deals

Mattresses

Home
Mattresses
King Size Mattresses

73-96 of 239 products

Relevance
Biggest Saving
Highest Price
Lowest Price

73-96 of 239 products

Filters

King Size

Size (1)King Size

Superking

(232)

6' x 6'6" | 180cm x 200cm

King Size

(239)

5' x 6'6" | 150cm x 200cm

Double

(247)

4'6" x 6'3" | 135cm x 190cm

Small Double

(177)

4' x 6'3" | 120cm x 190cm

Single

(255)

3' x 6'3" | 90cm x 190cm

Small Single

(16)

2'6" x 6'3" | 75cm x 190cm

Emperor

(24)

6'6" x 6'6" | 200cm x 200cm

Superking Zip and Link

(21)

6' x 6'6" | 180cm x 200cm

European King Size

(19)

5'3" x 6'6" | 160cm x 200cm

European Double

(15)

4'7" x 6'6" | 140cm x 200cm

Adjustable Single

(3)

3' x 6'6" | 90cm x 200cm

Adjustable Small Single

(2)

2'6" x 6'6" | 75cm x 200cm

Single Short

(1)

3' x 5'9" | 90cm x 175cm

Small Single Short

(1)

2'6" x 5'9" | 75cm x 175cm

Continental Cot

(2)

2' x 4' | 60cm x 120cm

3-Seater Sofa Bed Mattress

(1)

2-Seater Sofa Bed Mattress

(1)

Mattress Firmness

Extra Firm

(17)

Firm

(50)

Medium to Firm

(58)

Medium

(81)

Soft to Medium

(33)

Support System

Pocket Sprung

(192)

Standard Sprung

(30)

Foam Core

(15)

Miracoil

(4)

Posturepedic

(15)

Comfort Layer

Memory Foams

(70)

Natural Fibres

(73)

Gel Foams

(30)

Latex

(14)

Soft White Fibres

(40)

Standard Foam

(17)

Mattress Type

Orthopaedic

(35)

Medical Grade Foam

(4)

Rolled Up

(70)

Single-Sided Mattress

(189)

Double-Sided Mattress

(48)

Hypoallergenic

(65)

Pillow Top

(35)

Contract Mattress

(5)

Luxury Mattress

(63)

Eco Friendly

(33)

Brand

Silentnight

(19)

Sleepeezee

(24)

Sealy

(23)

Hypnos

(16)

Harrison Spinks

(13)

Millbrook Beds

(13)

Emma

(12)

TEMPUR

(3)

Simba

(9)

Relyon

(11)

SleepSoul

(8)

Wentworth Mercer

(10)

Rest Assured

(4)

Luna

(6)

MattressOnline

(9)

Panda

(2)

Mlily

(4)

Horizon

(5)

Uno

(1)

Salus

(3)

Jay-Be

(3)

Romantica

(3)

Bodyshape

(15)

Dunlopillo

(4)

Komfi

(6)

Kaymed

(5)

Aspire

(7)

Alpha

(1)

Price

£0 - £500

(72)

£500 - £1000

(94)

£1000 - £1500

(48)

£1500 - £2000

(15)

£2000 - £2500

(7)

£2500 - £3000

(1)

£3000 - £3500

(1)

£3500 - £4000

(1)

Mattress Depth

16cm - 20cm

(12)

21cm - 25cm

(83)

26cm - 30cm

(95)

31cm+

(49)

73-96 of 239 products

Relevance
Biggest Saving
Highest Price
Lowest Price

TEMPUR Ease 25 Mattress

5.0

Medium to Firm

Reflex Foam

Memory Foam

100-night comfort trial

RRP £1,399

Silentnight Memory 1400 Mirapocket Mattress

100-night comfort trial

RRP £724.99

Relyon Luxury Pashmina 2350 Pocket Mattress

100-night comfort trial

RRP £1,446

Harrison Spinks Bordley Natural 2750 Pocket Softer Mattress

100-night comfort trial

RRP £1,179

Relyon Lydia 3050 Pocket Pillow Top Mattress

We're Collecting Reviews

We're gathering feedback on this product. Only 1 in 20 customers leave a review, so check back soon to see what others think! Rest assured, all products are quality tested to meet our standards.

Soft to Medium

Pocket Springs

Wool

100-night comfort trial

RRP £1,850

Relyon Prairie 1000 Pocket Mattress

100-night comfort trial

RRP £899

Panda Hybrid Bamboo Mattress

100-night comfort trial

RRP £889

Sleepeezee Luxury 1400 Pocket Mattress

100-night comfort trial

RRP £899

Silentnight Ortho Dream Star Miracoil Mattress

100-night comfort trial

RRP £450

Emma Smart Hybrid Deluxe Mattress

100-night comfort trial

RRP £1,129

Bodyshape 1000 Pocket Hybrid Mattress

100-night comfort trial

RRP £650

Bodyshape Gel 2000 Pocket Hybrid Mattress

100-night comfort trial

RRP £780

Emma Original Elite Mattress

100-night comfort trial

RRP £1,099

Silentnight Air Plus 800 Mirapocket Mattress

100-night comfort trial

RRP £482.99

Relyon Orthofirm Deluxe 800 Pocket Mattress

100-night comfort trial

RRP £973

Emma Original Lite Mattress

100-night comfort trial

Was £335

Harrison Spinks Cotterdale 13250 Pocket Pillow Top Mattress

100-night comfort trial

RRP £3,289

Emma Diamond Spring Free Deluxe Mattress

New In

We're Collecting Reviews

We're gathering feedback on this product. Only 1 in 20 customers leave a review, so check back soon to see what others think! Rest assured, all products are quality tested to meet our standards.

Medium

Reflex Foam

Memory Foam

100-night comfort trial

RRP £2,219

Sleepeezee Ultimate Ortho 2000 Pocket Mattress

100-night comfort trial

RRP £1,249

Simba Hybrid Luxe Mattress

100-night comfort trial

RRP £1,899

Silentnight Miracoil Memory Cushion Top Mattress

100-night comfort trial

Star Buy

King Size£433

RRP £449.99

Free Delivery

Simba Natural Hybrid Source Mattress

100-night comfort trial

RRP £1,399

Simba Hybrid 1900 Pocket Mattress

100-night comfort trial

RRP £999

Rock Hard Ultra Firm Mattress

4.5

Extra Firm

Reflex Foam

100-night comfort trial

RRP £600

73-96 of 239 products

View All

01709 780 881

Sales Enquiries

Mon-Sat: 09:30am - 5:30pm

Sunday: 10am - 4pm

Customer Service

Mon-Sat: 09:30am - 5:30pm

Sunday: Closed

customerservice@mattressonline.co.uk

Trustpilot

MattressOnline.co.uk Ltd is authorised and regulated by the Financial Conduct Authority (FCA FRN 923012) and acts as a credit intermediary and not a lender, offering credit products provided exclusively by Klarna Bank AB (publ). Finance is only available to permanent UK residents aged 18+, subject to status, terms and conditions apply.

Filters

Size (1)King Size

Mattress Firmness

Support System

Comfort Layer

Mattress Type

Brand

Price

Mattress Depth

TEMPUR Ease 25 Mattress

Silentnight Memory 1400 Mirapocket Mattress

Relyon Luxury Pashmina 2350 Pocket Mattress

Harrison Spinks Bordley Natural 2750 Pocket Softer Mattress

Relyon Lydia 3050 Pocket Pillow Top Mattress

Relyon Prairie 1000 Pocket Mattress

Panda Hybrid Bamboo Mattress

Sleepeezee Luxury 1400 Pocket Mattress

Silentnight Ortho Dream Star Miracoil Mattress

Emma Smart Hybrid Deluxe Mattress

Bodyshape 1000 Pocket Hybrid Mattress

Bodyshape Gel 2000 Pocket Hybrid Mattress

Emma Original Elite Mattress

Silentnight Air Plus 800 Mirapocket Mattress

Relyon Orthofirm Deluxe 800 Pocket Mattress

Emma Original Lite Mattress

Harrison Spinks Cotterdale 13250 Pocket Pillow Top Mattress

Emma Diamond Spring Free Deluxe Mattress

Sleepeezee Ultimate Ortho 2000 Pocket Mattress

Simba Hybrid Luxe Mattress

Silentnight Miracoil Memory Cushion Top Mattress

Simba Natural Hybrid Source Mattress

Simba Hybrid 1900 Pocket Mattress

Rock Hard Ultra Firm Mattress

Sales Enquiries

Customer Service

Useful Links

Popular Categories