Measuring 4 ft wide x 6 ft 3 long, a small double mattress is the most underused size in UK bedrooms, and often the most practical answer for a room that cannot take a full double but has outgrown a single. At Land of Beds, we've been helping people across the UK find the right mattress for over 50 years. Whether you want a pocket spring for a teenager who needs something durable for the next eight years, a memory foam option for a solo adult who wants pressure relief without the footprint of a double, a hybrid for the best all-round daily performance in a compact room, or an open coil for a guest room used a few times a year, our small double mattress range covers every construction type, tension, and budget. Free mainland UK delivery, a Price Promise Guarantee, and honest advice from people who know this category properly come as standard.
Browse the full range below, or use our guides to find the right type and tension for the person sleeping on it. Our team is available seven days a week for a personal recommendation.
A small double is 30cm wider than a single and 15cm narrower than a full double. That sounds like a compromise, but for the right room and the right sleeper, it is actually the most logical choice on the page. It fits where a double will not, gives a solo sleeper considerably more room than a single, and works as a practical guest bed that can occasionally sleep two. The question is whether it is the right size for the specific person and room involved. At Land of Beds, we've been helping people work through exactly this for over 50 years, with honest advice and no pressure to buy.
Three things determine whether a small double mattress is the right choice. Get these right and the brand and price decision becomes straightforward.
| Factor | Why It Matters | What to Check |
|---|---|---|
| Who it's for and how it's used | A small double for a teenager used every night needs to perform for years. A guest room small double used a handful of times a year can be a more modest investment. The use case should drive the budget and construction choice. | Age and weight of the primary sleeper, how often the mattress will be used, whether it's a main bedroom or occasional-use room |
| Construction type | Construction determines how the mattress feels, handles warmth, and lasts under daily use. For a teenager or solo adult who will sleep on this every night, construction quality matters as much as it does on a double or king. | Pocket spring vs memory foam vs hybrid vs open coil, based on the sleeper's age, weight, position, and temperature |
| Is small double actually the right size? | A small double gives a solo sleeper 120cm of width - significantly more than a single. For two adults sharing regularly, it gives each person around 60cm, which is very snug. Being clear about the primary use case before buying prevents a decision that needs revisiting within a year or two. | Whether the room fits a full double, how often two people will share it, whether a taller sleeper needs more than 190cm in length |
Not sure whether small double or double is right? See our double mattresses to compare, or speak to our team on 01928 242829.
A standard UK small double mattress measures 120 x 190cm (4ft x 6ft 3in). It is sometimes listed as a 4ft mattress, a three-quarter bed mattress, or a 3/4 mattress. Some retailers also use the term queen size, which in the UK refers to the same dimensions - though this can cause confusion with US sizing.
| Dimension | Measurement | Notes |
|---|---|---|
| Width | 120cm (4ft) | 30cm wider than a single; 15cm narrower than a full double |
| Length | 190cm (6ft 3in) | The same length as a single and double. Suits sleepers up to approximately 5ft 10in. |
| Space for two | Approximately 60cm per person | Very snug for two adults sharing regularly. More comfortable as an occasional guest arrangement. |
| Typical depth | 20 to 32cm | Depth varies by construction. What matters is material quality, not depth alone. |
A note on the queen size name: A note on naming: small double mattresses are sold under several names in the UK: 4ft mattress, three-quarter bed, 3/4 bed, and queen size all refer to the same 120 x 190cm size. Queen size was the common UK industry term for this size before retailers shifted to small double, which is why you will still find it used by some retailers and on older bed frames. The one to watch is queen size when shopping internationally: in the UK it means 120 x 190cm, but a US queen size is wider, closer to a UK standard double. If you are ordering online and see queen size listed, always check the actual dimensions are 120 x 190cm before purchasing.
See our UK Bed Sizes Guide for full room-measuring advice.
The right construction for a small double depends almost entirely on who will sleep on it and how often. Here's a plain comparison of every type we stock in this size.
| Type | Key Features | Best For |
|---|---|---|
| Pocket Spring | Individual springs move independently; natural airflow; filling layers on top; responsive, buoyant feel | Teenagers and solo adults using it as their main sleeping surface; anyone who sleeps warm; long-term everyday use |
| Memory Foam | Contours closely to the body; excellent pressure relief; absorbs movement; can retain heat unless gel-infused. | Best for solo adults with pressure discomfort at shoulders or hips and lighter sleepers who prefer minimal motion transfer. |
| Hybrid | Pocket springs with foam or latex comfort layers; combines airflow and edge support with pressure relief | The best all-round choice for everyday use in a main bedroom; teenagers who want performance and durability |
| Open Coil | Connected spring network; more affordable; less durable under daily use | Guest rooms used occasionally; first beds for younger teenagers where budget is the priority |
| Orthopaedic | Firmer construction designed to support spinal alignment | Solo adults with back concerns; heavier sleepers needing consistent firm support |
Choose a pocket spring small double if:
Choose a memory foam small double if:
Choose a hybrid small double if:
Choose an open coil small double if:
One thing our team sees regularly: a small double bought for a teenager at 14, then replaced at 17 because the frame has been upgraded to a full double. If the room has space for a double now, it is often worth going straight to double size and pairing it with a quality mattress that lasts. The small double is the right answer when the room genuinely cannot take a double - not as a transitional purchase.
Small double mattresses are bought for a wide range of ages and body weights. Tension should follow the sleeper's weight and position.
| Tension | Best For | What It Does |
|---|---|---|
| Soft | Lighter sleepers under 60kg (9st 6lb); side sleepers needing shoulder and hip relief | More sink-in; good pressure relief; may feel insufficiently supportive for a heavier teenager or adult |
| Medium Soft | 60 to 75kg (9st 6lb to 11st 11lb); side and combination sleepers | Balances cushioning and support; suits most average-weight teenagers |
| Medium | 70 to 90kg (11st to 14st 2lb); back and combination sleepers; adults using this as a permanent main mattress | Good all-round support; the most versatile tension for solo adult use |
| Firm | Heavier sleepers; front sleepers; those needing consistent spinal support | Minimal sink; strong support; also recommended for younger teenagers' spines |
If two adults share this mattress regularly, choose tension based on the heavier sleeper's weight. At 120cm wide, neither person has enough space to sleep entirely independently of the other's weight distribution.
The materials inside a small double mattress determine its feel, durability, and how well it handles temperature - all relevant given the range of people this size is bought for.
| Material | Performance and Maintenance | Best For |
|---|---|---|
| Pocket Springs | Individual springs reduce motion and improve airflow. No maintenance beyond rotation. More durable under daily use than open coil. | Teenagers and adults; everyday main bedroom use |
| Memory Foam | Pressure-relieving and body-contouring. Can retain heat; gel-infused versions manage this better. Wipe-down only. | Solo adults with pressure discomfort; lighter sleepers |
| Natural Fillings (wool, cotton) | Breathable and temperature-regulating year-round. Found in mid-range to premium small double mattresses. | Temperature-sensitive sleepers; buyers who want natural materials |
| Open Coil Spring | Budget-friendly connected spring system. Reliable for occasional use. Less durable under daily use. | Guest rooms; shorter-term or lighter use |
See our Mattress Buying Guide for more detail on how construction affects long-term sleep performance.
Budget should follow how the mattress will be used. A teenager's everyday sleeping surface deserves more investment than an occasional guest room.
| Budget | What You Get | Best For |
|---|---|---|
| Under £200 | Open coil or basic foam. Reliable for occasional use. Not suited to nightly use by a teenager or adult over several years. | Guest rooms; very occasional use |
| £200 to £449 | Pocket spring or memory foam with improved comfort layers and better durability. Where most buyers for a teenager's main bedroom land. | Teenagers' and solo adults' everyday bedrooms; compact main bedrooms on a controlled budget |
| £450 and above | Better construction, natural filling options, longer guarantees. Built to last 8 to 10 years under daily use. | Solo adults using a small double as their permanent main sleeping surface; buyers who want long-term performance |
Mike Murray, Land of Beds CEO: "The small double is often bought as a compromise, but it shouldn't be treated like one when it comes to construction quality. A teenager sleeping on an open coil mattress every night for the next six years will feel the difference compared to a mid-range pocket spring within the first few months. The size is a practical decision. The construction quality should not be."
Looking for a quality small double mattress at a lower price? We stock entry-level options from trusted brands across this size, with regular promotions throughout the year. Browse and filter by price to see what's available.
Our Price Promise Guarantee means you won't pay more than you should. Finance is available on eligible orders, with interest-free options on selected terms. See our finance page for details.
| Single Mattress | Small Double Mattress | Double Mattress | |
|---|---|---|---|
| Dimensions | 90 x 190cm | 120 x 190cm | 135 x 190cm |
| Width difference | - | 30cm wider than single | 15cm wider than small double |
| Space for one adult | 90cm | 120cm - noticeably more room | 135cm - generous for one |
| Space for two adults | Not suitable for two | Approximately 60cm each - snug | Approximately 67cm each - manageable |
| Room requirement | From around 2.1m wide | From around 2.4m wide | From around 2.6m wide |
| Best for | Young children, compact rooms, guest rooms | Older teenagers, solo adults in compact rooms, occasional guest use for two | Couples, solo adults wanting more space, main bedrooms |
The small double sits in a specific and useful gap. It is the right answer when a single is too small and a double does not fit, or when a solo sleeper wants considerably more room without the full footprint of a double. It is not the right answer when two adults will share the bed regularly and a double can fit in the room.
| Item | Typically Included? |
|---|---|
| Mattress | Yes - always |
| Removable, washable cover | Sometimes - check the individual product listing |
| Trial period | On selected models only - check before ordering |
| Bed base or frame | No - unless part of a bundle |
| Mattress protector | No - sold separately and strongly recommended |
Always check the individual product listing for full details before purchasing.
| What We Offer | Why It Matters to You |
|---|---|
| 50+ years of expertise | Practical knowledge of what works for every age group and use case in this size |
| Genuinely independent advice | We're not tied to any brand. Our recommendation is based on who's sleeping on it and how. |
| Range across every budget | From entry-level open coil to mid-range pocket spring and hybrid in small double size |
| Free mainland UK delivery | Free on orders over £100. Some remote postcodes may incur a charge - check at checkout. |
| Price Promise Guarantee | Find it cheaper like-for-like elsewhere and we'll match it |
| Flexible finance available | Interest-free options on selected terms - see our finance page for details |
| Expert advice, 7 days a week | Real people via phone, chat, or in-store. No scripts, no pressure. |
| 9,000+ verified Trustpilot reviews | Real feedback from real customers across thousands of orders |
Not sure whether a small double is the right size, or which construction suits the sleeper? Our team has helped thousands of customers work through exactly this - and there's no obligation to buy. Visit our showrooms in Cheshire and Greater Manchester, or reach us online. 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: 01928 242829 | Speak directly with a mattress expert. Best for size comparisons and age-appropriate advice. |
| In-store (Cheshire / Greater Manchester) | Try mattresses in person before you buy. Useful when deciding between small double and double. |
| Email: [email protected] | For non-urgent questions. We aim to respond within one working day. |
| Help Centre | Buying guides, size guides, and FAQs available 24/7. |
| Question | Answer |
|---|---|
| What size is a small double mattress in the UK? | A UK small double mattress measures 120cm wide by 190cm long (4ft x 6ft 3in). It is 30cm wider than a standard single and 15cm narrower than a standard double. It is sometimes listed as a 4ft mattress or a three-quarter mattress. |
| Is a small double the same as a queen size? | In the UK, yes - a small double and a queen size refer to the same 120 x 190cm dimensions. However, a US queen size is a different measurement, closer to a UK standard double in width. Always check the actual dimensions (120 x 190cm) rather than relying on the name when shopping online. |
| Is a small double big enough for two people? | For occasional use, yes. Two adults sharing a small double have approximately 60cm of personal space each, which is snug but manageable for an occasional guest arrangement. For two adults sharing every night as a permanent sleeping arrangement, a full double (135 x 190cm) will almost always give a better result. |
| What is the best small double mattress for a teenager? | For a teenager using it as their main sleeping surface, a mid-range pocket spring or hybrid gives the durability and support needed for daily use over several years. Avoid open coil mattresses for a teenager's main bedroom - they are better suited to occasional-use guest rooms. Medium to medium-firm tension suits most teenagers of average weight. |
| What is the best small double mattress for a guest room? | For a guest room used a few times a year, an open coil or entry-level foam mattress is a practical, cost-effective choice. There is no need to invest in a premium construction for occasional use. |
| How does a small double compare to a double mattress? | A small double is 120 x 190cm. A double is 135 x 190cm - 15cm wider. For a solo sleeper in a compact room, the small double often works just as well as a double at a lower price and smaller footprint. For two people sharing regularly, the extra 15cm of a full double makes a meaningful difference to personal space. See our double mattresses to compare. |
| How long should a small double mattress last? | A quality mid-range pocket spring or hybrid small double mattress should last 7 to 10 years under daily use. Entry-level open coil mattresses used nightly tend to show wear more quickly, typically 3 to 5 years. Using a mattress protector and rotating as the manufacturer recommends both help extend the lifespan. |
| Do small double mattresses fit all small double bed frames? | Yes - a standard UK small double mattress (120 x 190cm) fits all standard UK small double bed frames. Always measure the internal sleeping area of your frame if it is older or non-standard before ordering. |
| Do you offer free delivery on small double mattresses? | Yes. Free mainland UK delivery on orders over £100. Some remote postcodes may incur a charge - check at checkout. Lead times vary by brand; check the individual product listing. |
| Can I buy a small double mattress on finance? | Yes. Finance is available on eligible orders, with interest-free options on selected terms. See our finance page for eligibility and how to apply. |
| Should I buy a small double or a double mattress? | Measure the room first. If a full double fits comfortably with clearance on both sides, it is usually the better long-term choice - particularly if the room will be used by a teenager who might eventually want more space. If the room cannot take a double, or if the sleeper is a solo adult in a compact bedroom who genuinely does not need the extra 15cm of width, a small double is the right and practical answer. |
