Double Mattresses
Double mattresses are our most popular size - perfect for couples, solo sleepers, and growing teens. Choose from hundreds of in-stock options, including memory foam, pocket sprung, or latex. Shop trusted UK brands like Silentnight and Simba - all with free next day delivery.
We've been a specialist mattress retailer since 2003, and more than 72,000 Trustpilot reviewers rate us 4.7 out of 5. Our double mattress range covers over 40 trusted brands, from Silentnight and Sealy to Hypnos and TEMPUR. A selection are Which? Best Buy or Good Housekeeping award winners. If you're not sure which is right for you, our Sleep Experts can help. Every mattress comes with a 100-Night Sleep Trial, so you can test your mattress, hassle-free.
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Size Double
Mattress Firmness
Support System
Comfort Layer
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Price
Mattress Depth
Luna Memory 2500 Pocket Hybrid Mattress
RRP £870
Silentnight Air Plus 1400 Mirapocket Ortho Mattress
RRP £581.99
Komfi Unity Memory Deluxe Mattress
RRP £235
Millbrook Wool Luxury 1000 Pillow Top Mattress
RRP £945
Rest Assured Northington 2000 Pocket Natural Mattress
RRP £760
Harrison Spinks Quilted Fusion 4000 Pocket Mattress
RRP £1,359
SleepSoul Comfort 800 Pocket Mattress
RRP £330
Hypnos Burford Ortho Comfort Mattress
RRP £1,306
Copper Fresh Envy Supreme Mattress
RRP £999
Sealy Eaglesfield Memory Ortho Plus Mattress
RRP £649
Millbrook Wool Luxury 3000 Pocket Pillow Top Mattress
RRP £1,181
Relyon Cerrado 1000 Pocket Pillow Top Mattress
RRP £823
Emma Original Pro Mattress
RRP £749
Emma Original Classic Mattress
RRP £528
Mlily Bamboo+ Superb Ortho Memory 2500 Pocket Mattress
RRP £945
Sleepeezee Luxury 1400 Pocket Mattress
RRP £849
Wentworth Mercer Natural Pocket 2000 Ortho Mattress
RRP £884
Kaymed Smart Phase 1600 Pocket Hybrid Mattress
RRP £1,320
Mlily Bamboo+ Memory 800 Pocket Mattress
RRP £675
Hypnos Winslow Luxury Wool Mattress
RRP £2,321
Sealy Steeple Ortho Plus Mattress
RRP £699
Sleepeezee Graphite Echo 4700 Pocket Pillow Top Mattress
RRP £1,599
Millbrook Wool Luxury 5000 Pocket Mattress
RRP £1,607
Wentworth Mercer Natural Pocket 1000 Mattress
RRP £612
What size is a UK double mattress?
All of our UK double mattresses measure 135cm x 190cm (4'6" x 6'3") - the ideal size for couples, guest rooms, or solo sleepers who want more space.
Will a double mattress fit my bed?
If your bed frame fits a 135cm x 190cm mattress, any double mattress from our range will fit perfectly.
Whether you're shopping for a mattress for a double bed or looking for a double-size mattress, we’ve got options in stock and ready to ship.
How deep should my double mattress be?
Most of our double mattresses range from 20cm to 30cm deep, giving you plenty of choice to suit your current bed frame and bedding. Whether you prefer a low-profile style or extra-deep luxury, we’ve got a double mattress to suit your needs.
Why buy your double mattress from MattressOnline?
Buying a mattress online should be stress-free. Here's what you get with MattressOnline.
- 100 Nights to be sure: Sleep on your new double mattress for 100 nights. If it isn't right for you, our 100-Night Sleep Trial has you covered.
- Real expert help: Our Sleep Experts, led by our Head of Sleep Science, answer the questions a spec description can't.
- Awarded products, not just claims: We stock Which? Best Buy and Good Housekeeping award-winning mattresses from over 40 brands. We're also seven-time NBF Bed Retailer of the Year, so you can trust us with your sleep.
- Over 20 years, 72,000+ reviews: We've sold mattresses since 2003 and hold a 4.7 out of 5 Trustpilot rating.
- Delivered fast, hassle-free: Order by 4pm for free next day delivery to most of the UK. Add mattress recycling at checkout and we'll take your old one away. No stress.
Expert Tips: How firm should my double mattress be?
Our double mattresses come in every firmness level to suit your sleep style. Here’s what our Head of Sleep Science recommends:
- Soft-medium - gentle cushioning
- Medium - balanced support for most sleepers
- Medium-firm - ideal for couples with different comfort needs
- Firm - great for back sleepers
- Extra firm - our most supportive feel
Not sure what firmness is right for you? Try our 100-Night Comfort Trial risk-free.
How much do double mattresses cost?
Double mattress prices vary based on brand and materials, but our Sleep Experts have selected options for every budget:
- Budget: from £200 - affordable comfort you can rely on, every night
- Mid range: £300-£400 - enhanced support and added features for long-term comfort
- Premium: £600-£3000+ - luxury craftsmanship from the UK’s top mattress brands
Our Sleep Experts work directly with trusted names like Silentnight, Sealy, and Harrison Spinks to offer the best quality double mattresses at every price point.
You'll find our best price double mattresses in the latest double mattress sale - all with free next day delivery.
Can you take away my old double mattress?
Yes, when you order a double mattress from MattressOnline, we can take your old one away for just £35.
Our non-profit recycling service ensures every part of your old mattress is responsibly processed - giving you peace of mind with your purchase.
Advice and buying guides
See what our customers say about us
Why buy from MattressOnline?
Free delivery to most locations
Free next working day delivery on most of our mattresses and beds, or upgrade to weekend delivery.
100-night mattress comfort trial
Test your mattress for 100 nights and if you don't like it, simply swap it.
Old mattress disposal
We can collect and recycle your mattress - saving it from landfill.
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
