King size mattresses

From £350

Posture Pocket Mattresses | Gold 2000 Pocket Spring- Med | King-size Mattress

^£869⁹⁹
Memory Mattresses | 1500 Pocket Springs - Med/Firm | King-size Mattress

^£569⁹⁹
Posture Pocket Mattresses | Gold 2000 Pocket Spring- Firm | King-size Mattress

^£869⁹⁹
Marlborough Mattresses | 6000 Pocket Spring - Medium | King-Size Mattress

^£1,149⁹⁹
Silverdale Mattresses | PostureTech with GelTex Layer | King-Size Mattress

^£849⁹⁹
Memory Mattresses | 1200 Pocket Springs - Firm | King-size Mattress

^£549⁹⁹
Rivington Mattresses | Wool & Silk Pillowtop - Med | King-Size Mattress

^£899⁹⁹
Sleep Plus Mattresses | 1000 Pocket Springs - Ortho | King-size Mattress

^£419⁹⁹
Posture Pocket Mattresses | Silver 1000 Pocket Spring- Fir | King-size Mattress

^£749⁹⁹
Posture Pocket Mattresses | Silver 1000 Pocket Spring- Med | King-size Mattress

^£749⁹⁹
Ashdown Mattresses | Micro Springs & Wool - Regular | King-Size Mattress

^£1,199⁹⁹
Marlborough Mattresses | 5000 Pocket Spring - Firm | King-Size Mattress

^£1,099⁹⁹
Posture Pocket Mattresses | Bronze 600 Pocket Spring- Firm | King-size Mattress

^£619⁹⁹
Blakemere Mattresses | Wool & Pillowtop - Firmer | King-Size Mattress

^£1,699⁹⁹
Marlborough Mattresses | 4000 Pocket Spring - Medium | King-Size Mattress

^£949⁹⁹
Blakemere Mattresses | Wool & Pillowtop - Regular | King-Size Mattress

^£1,699⁹⁹
Pennington Mattresses | PostureTech Springs - Firm | King-Size Mattress

^£579⁹⁹
Delamere Mattresses | Pocket Spring & Wool - Regular | King-Size Mattress

^£1,449⁹⁹
Ingleton Mattresses | British Wool Pillowtop | King-Size Mattress

^£979⁹⁹
Sleep Core Mattresses | 18cm Foam - Firm | King-size Mattress

^£349⁹⁹
Lynton Mattresses | Wool & Silk - Med/Firm | King-Size Mattress

^£829⁹⁹
Delamere Mattresses | Pocket Spring & Wool - Firmer | King-Size Mattress

^£1,449⁹⁹
Posture Pocket Mattresses | Bronze 600 Pocket Spring- Med | King-size Mattress

^£619⁹⁹
Wool Mattresses | 1000 Pocket Springs - Ortho | King-Size Mattress

^£519⁹⁹
Melrose Mattresses | GelTex Layer with Mini Springs | King-Size Mattress

^£1,049⁹⁹
$Sealy Bloomfield Latex King-Size Mattress$

Bloomfield Mattresses | Latex Layer with Quilted Top | King-Size Mattress

^£829⁹⁹
Marlborough Mattresses | 3000 Pocket Spring - Firm | King-Size Mattress

^£869⁹⁹
Ashdown Mattresses | Micro Springs & Wool - Firmer | King-Size Mattress

^£1,199⁹⁹

King-size bed mattresses

Enjoy a relaxing and spacious night’s sleep on one of our king-size mattresses. These roomy mattresses are ideal for those who love comfort, families with young children and couples who like their own space.

We ensure that all of our mattresses are made to the highest standards, and offer a choice of fillings and different levels of firmness so that you can find the perfect one for your individual needs.

Choose your ideal firmness

We have a variety of long-lasting mattresses to choose from so you can be sure to find one that suits you. Ranging from ultra-supportive to extra cosy – with designs combining pocket springs and foam for maximum comfort.

Our king-size mattresses are hypoallergenic and covered with luxurious upholstery to make sure your temperature is well-regulated. To find equally comfortable mattresses for all other beds in your home, check out our full range of different-sized mattresses.

If you need help with choosing, check out our mattresses guide, where you’ll find comprehensive information that will help you work out which is ideal for you.

Complete your bedroom

Pair our king-size mattresses with one of our king-size bed frames to create a complete bedroom look.

Our bed frames are designed to complement our mattresses and we offer a wide choice when it comes to styles. Browse our selection of natural oak, rustic oak, painted and upholstered designs to find the perfect addition to your sleep sanctuary.

Coordinate a king-size bed with a set of matching hardwood bedroom furniture for a sleek, uniform look. Our oak designs are highly versatile and great for adding warmth to your room, while our painted furniture has a modern yet traditional appeal, depending on the shade you choose.

Browse our complete selection of king-size mattresses to find the perfect one for you.

†Prices displayed are based on Interest-Free Credit over 36 months with the monthly payment amount rounded up to the nearest whole pence. To qualify for interest-free credit a minimum basket spend of £499 is required. Finance is subject to status, age, affordability and credit checks. T&Cs apply.

▵ Finance is only available to residents aged 18 or over. Subject to status, age, affordability and credit checks. Our calculator provides an illustrative example only. Exact monthly repayments will be displayed prior to submission of your finance application to our lenders or lending partners. Should you proceed to pay via finance, exact monthly payments will be displayed prior to submission of your finance application to our lenders partners.

Oak Furnitureland is a trading name of Oak Furnitureland Group Limited (FRN: 928005) which is an Appointed Representative of Consumer Credit Compliance Limited who are authorised and regulated by the Financial Conduct Authority (FRN: 631736). The permissions of Consumer Credit Compliance Limited as a Principal firm allow Oak Furnitureland Group Limited to undertake credit broking.
Oak Furnitureland Group Limited acts as a credit broker not a lender and will introduce you to Secure Trust Bank PLC trading as V12 Retail Finance and Creation Consumer Finance Limited to complete your application for finance. We do not earn a fee or commission for the introduction. Late payment fees and other charges may be payable, please refer to your finance agreement for full details and T&Cs.

* Delivery - 7-day delivery and Christmas delivery on selected lines only. Subject to stock availability and based on accepting the first delivery date offered. Available dates are presented at checkout, and may vary depending on the delivery option selected. Due to a limited delivery schedule to the Isle of Wight, 7-day delivery may be limited in this area. Deliveries to the Isle of Wight are subject to a £70 surcharge which will be applied at checkout. 
*Lifetime Furniture Guarantee covers the structural framework of all of our furniture, giving you confidence they’re built to last. T&Cs apply.
* Half Price Chairs - Offer is limited to up to 10 dining chairs when you buy any dining table. Dining chairs are sold in pairs.

© 2025 Oak Furnitureland. All rights reserved. Company reg. 12645185. VAT reg. GB350645607 Registered Address: Oak Furnitureland Group Ltd, Unit DC2, Viscount Way, South Marston Ind Estate, Swindon, Wiltshire SN3 4TN. Registered in England and Wales.

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King size mattresses

King-size bed mattresses

Choose your ideal firmness

Complete your bedroom

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