Deep mattresses measure between 20cm and 29cm, giving you a more substantial comfort layer and spring or foam depth than a standard mattress, without moving into the thickest end of the range. At Land of Beds, we've been helping people across the UK find the right mattress for over 50 years. Our deep mattress range spans memory foam, natural fibre, gel, and pocket sprung options across a wide range of tensions and sizes, with prices starting from £189. Free mainland UK delivery, our Price Promise Guarantee, and expert advice are included as standard.
Browse the full range below, or read on for our size and filling guides. Our team is available seven days a week if you'd like a personal recommendation.
Mattress depth is easy to overlook when you're focused on tension or filling, but it affects how the mattress feels underfoot, how it performs over time, and what else you'll need to buy alongside it, from fitted sheets to a suitable headboard height. A deep mattress, between 20cm and 29cm, sits in the middle ground: substantial enough for a proper comfort layer, without moving into the thickest and heaviest end of the market. At Land of Beds, we've spent over 50 years helping people work out which depth actually suits their bed, their budget, and how they sleep.
Three things determine whether a deep mattress is the right fit for you.
| Factor | Why It Matters | What to Check |
|---|---|---|
| Bed frame and headboard height | A deeper mattress sits higher, which can affect how a headboard or footboard looks and whether fitted bedding still fits properly. | Your bed frame's clearance and whether your headboard height suits a deeper mattress |
| Filling and construction | Depth alone doesn't determine comfort, the filling and spring construction inside that depth do. | Which filling type and spring count you want within your chosen depth |
| Fitted sheet compatibility | Standard fitted sheets aren't always deep enough for mattresses at the upper end of this range. | Whether you'll need deep-fitted sheets and mattress protectors to match |
Not sure where you fall? Speak to our team or use the quick decision guide further down this page.
Deep mattresses in this range are available across all standard UK sizes. Match your mattress size exactly to your bed frame or divan base.
| Size | Mattress Dimensions | Best For |
|---|---|---|
| Single (3ft) | 90 x 190cm | Children, teens, solo sleepers, guest rooms |
| Small Double (4ft) | 120 x 190cm | Solo sleepers wanting more room, compact couples |
| Double (4ft 6) | 135 x 190cm | Couples in smaller bedrooms, guest rooms |
| King Size (5ft) | 150 x 200cm | Couples wanting more width and length |
| Super King (6ft) | 180 x 200cm | Couples wanting maximum space, larger bedrooms |
See our What Makes a Good Mattress? guide for more help matching depth and size to your needs.
The filling inside a deep mattress determines how that extra depth actually feels, rather than the depth measurement alone.
| Type | Key Features | Best For |
|---|---|---|
| Memory Foam | Contours closely to the body, strong pressure relief, can retain more heat than other fillings | Side sleepers wanting close-conforming pressure relief |
| Natural Fillings | Cotton, wool, silk, or cashmere layered over pocket springs, breathable and temperature-regulating | Sleepers wanting a traditional, breathable feel |
| Gel | Responds to body weight with a cooling sleep surface | Warmer sleepers wanting pressure relief without overheating |
| Pocket Sprung | Individually wrapped springs that move independently, reducing partner disturbance | Couples, and sleepers wanting responsive support |
Choose Memory Foam if:
Choose Natural Fillings if:
Choose Gel if:
Choose Pocket Sprung if:
In our showrooms, customers are often surprised that a deeper mattress doesn't automatically mean a softer or firmer feel, it's the filling and spring construction inside that depth that decides the tension, not the depth itself.
Your budget affects filling quality, spring count, and how well the mattress holds its comfort over time.
| Budget | What You Get | Best For |
|---|---|---|
| Under £500 | Entry-level memory foam or pocket sprung comfort layers over a simpler base. Comfortable, but may compress faster with regular use. | Guest rooms, first homes, occasional use |
| £500 to £999 | Better quality fillings, higher pocket spring counts, more durable comfort layers. Where most main bedroom buyers land. | Everyday use in a main bedroom |
| £1,000+ | Premium natural fillings, high pocket spring counts, superior build quality designed to hold their shape for longer. | Long-term investment, master bedrooms |
A higher-quality deep mattress tends to hold its shape and support for longer, so the extra depth keeps performing rather than compressing down within a couple of years.
Mike Murray, Land of Beds CEO: "Depth on its own doesn't tell you much about quality, it's what's layered inside that depth that matters. A deep mattress with a well-built spring system and proper filling will outlast a similarly deep one that's just been padded out to look substantial."
Looking for a quality deep mattress at a lower price? We have options starting from £189, with regular sales across selected models. Browse our affordable deep mattresses to see what's available at your budget.
Our Price Promise Guarantee means you won't pay more than you should. 0% finance is available on eligible orders, spread the cost over a range of terms to suit your budget. See our finance options for details.
Not sure whether a deep mattress or a thick mattress is right for you? Here's a plain comparison.
| Deep (20cm to 29cm) | Thick (30cm+) | |
|---|---|---|
| Feel | Substantial comfort layer without excessive weight or height | Maximum comfort layer and depth available |
| Bed frame fit | Suits most standard frames and headboards | May need a taller headboard or deeper frame clearance |
| Bedding | Standard fitted sheets often still work, check the upper end of the range | Deep-fitted sheets and protectors are usually required |
| Best for | Most sleepers wanting a step up from a standard mattress | Sleepers prioritising maximum depth and cushioning above all else |
Neither is objectively better, it depends on how much depth you actually want and what your bed frame can accommodate. Read our full guide: What Makes a Good Mattress?.
Inclusion varies by product. As a general guide across our range.
| Item | Typically Included? |
|---|---|
| Mattress | Yes, always |
| Cover / fabric casing | Yes, always |
| Handles for turning or rotating | Usually yes, check individual listing |
| Old mattress removal | Available on most models as a paid add-on, check the individual listing to confirm |
| Delivery | Yes, free on orders over £100 |
Always check the individual product listing for full details on what's included, including whether old mattress removal is available, before purchasing.
| What We Offer | Why It Matters to You |
|---|---|
| 50+ years of expertise | Deep product knowledge across hundreds of mattresses |
| A wide range of deep mattresses | One of the widest independent selections in the UK |
| Free mainland UK delivery | No delivery charges on orders over £100 |
| Price Promise Guarantee | We'll match any like-for-like price you find elsewhere |
| 0% finance available | Spread the cost on eligible orders |
| Expert advice, 7 days a week | Real people via phone, chat, or in-store, no scripts, no pressure |
| Family-run, independent retailer | We recommend what's right for you, not what's easiest for us |
| 9,000+ verified Trustpilot reviews | Real feedback from real customers across thousands of orders |
Not sure which deep mattress is right for you? Our expert team has helped thousands of customers make this decision, and there's no pressure to buy. Chat online, call us, or visit our showrooms in Cheshire and Greater Manchester. We're open seven days a week.
| How to Reach Us | What to Expect |
|---|---|
| Live chat | Fast responses for quick questions. Available during opening hours. |
| Phone | Speak directly with a mattress expert on 01928 242829. Best for detailed advice. |
| In-store (Cheshire / Greater Manchester) | Try mattresses in person before you buy. |
| Help Centre | Buying guides, size guides, and FAQs available 24/7. |
| Question | Answer |
|---|---|
| What's the best deep mattress to buy? | Depends on your filling preference, sleeping position, and budget, since depth alone doesn't determine comfort. Use the quick decision guide above to narrow down by filling type. |
| Will any bed frame or divan base fit a deep mattress? | Yes, as long as the mattress size matches your frame or base exactly. Check your headboard height still looks right with the added depth. |
| Do I need special bedding for a deep mattress? | Standard fitted sheets often still work at the lower end of this range, but check the depth of your fitted sheets and mattress protector against the mattress depth, particularly towards the upper end. |
| How long should a deep mattress last? | Typically 7 to 8 years with regular use, though this varies by filling and build quality rather than depth alone. |
| What size deep mattress should I choose? | Match your mattress size exactly to your existing or new bed frame or divan base. See the size guide above for dimensions and room guidance. |
| Does a deeper mattress mean a softer or firmer feel? | Not necessarily. Depth and tension are separate things, a deep mattress can be soft, medium, or firm depending on the filling and spring construction inside it. |
| Does a deep mattress require assembly? | No assembly is needed. If your mattress is delivered rolled and vacuum-packed, allow it time to fully expand before use, check the listing for guidance. |
| Do you offer free delivery on deep mattresses? | Yes. Free UK delivery on orders over £100. Some further out postcodes may incur a charge. See our delivery information for details. |
| Can I buy a deep mattress on finance? | Yes. 0% finance is available on eligible orders. See our finance page for terms and eligibility. |
| What's the difference between a deep mattress and a thick mattress? | Deep mattresses measure 20cm to 29cm, while thick mattresses measure 30cm or more. See the comparison above for how bed frames and bedding needs differ between the two. |
| Is old mattress removal available with a deep mattress order? | Available on most models as a paid add-on. Check the individual product listing to confirm before you order. |
