What Are the Standard UK Mattress Sizes?
Quick Answer: UK standard mattress sizes are Shorty Small Single (75cm x 175cm), Small Single (75cm x 190cm), Single (90cm x 190cm), Small Double (120cm x 190cm), Double (135cm x 190cm), King (150cm x 200cm), and Super King (180cm x 200cm).
Last month, a frustrated customer named James called our sales team. "I've measured my bed frame three times," he said, "and I'm getting 135cm by 200cm, but every website shows different sizes for doubles. I just want to order the right mattress!"
James's confusion is incredibly common. UK mattress sizing isn't as straightforward as it should be, with variations between manufacturers, confusion about European sizes, and the added complexity of room planning. After helping thousands of customers navigate these sizing challenges, I've learned that getting the measurements right from the start saves enormous hassle later.
Whether you're buying your first mattress, upgrading to a larger size, or moving to a new home, understanding UK mattress dimensions helps you make confident purchasing decisions and plan your bedroom space effectively.
Complete UK Mattress Size Chart
Here's the definitive guide to UK mattress dimensions:
Shorty Small Single Mattress
Dimensions: 75cm x 175cm (2'6" x 5'9") Best For: Children under 10, very compact spaces, cabin beds, high sleepers Room Size Needed: Minimum 2.3m x 2.5m for basic movement
The Shorty Small Single is the most compact mattress size available, specifically designed for younger children who don't need the full 190cm length. This size is perfect for children under 10 years old and works exceptionally well with space-saving furniture like cabin beds, mid-sleepers, and bunk beds.
When to Choose Shorty Small Single:
- Children's bedroom furniture specifically designed for shorter mattresses
- Maximising floor space in very small bedrooms
- Creating play areas underneath elevated beds
- Budget-conscious families wanting quality comfort in a smaller size
Growth Considerations: Most children will outgrow this size by age 10-12, making it ideal for younger children but requiring eventual upgrade to Single or Small Single sizes as they grow.
Small Single Mattress
Dimensions: 75cm x 190cm (2'6" x 6'3") Best For: Children's bedrooms, very compact spaces, bunk beds Room Size Needed: Minimum 2.5m x 2.5m for basic movement
The small single is the most compact option, perfect for children transitioning from cot beds or adults with severely limited space. Despite its compact size, it provides adequate sleeping space for most children and petite adults.
Single Mattress
Dimensions: 90cm x 190cm (3' x 6'3")
Best For: Children, teenagers, guest rooms, single adults, bunk beds Room Size Needed: Minimum 2.5m x 3m for comfortable movement
The standard single remains the most popular choice for children's bedrooms and guest accommodations. It offers more space than a small single whilst still fitting comfortably in most bedrooms.
Small Double Mattress
Dimensions: 120cm x 190cm (4' x 6'3") Best For: Single adults wanting extra space, compact couples, teen bedrooms Room Size Needed: Minimum 3m x 3.5m
The small double bridges the gap between single and double, offering extra space for single sleepers without the full footprint of a double mattress. It's particularly popular with teenagers who want to upgrade from single beds.
Double Mattress
Dimensions: 135cm x 190cm (4'6" x 6'3") Best For: Couples in smaller bedrooms, single sleepers who prefer maximum space Room Size Needed: Minimum 3.5m x 3.5m
The traditional double provides adequate space for most couples, though those accustomed to King size often find it limiting. It remains popular due to fitting well in Victorian and older British homes with smaller bedrooms.
King Size Mattress
Dimensions: 150cm x 200cm (5' x 6'6") Best For: Couples wanting comfortable space, taller individuals, master bedrooms Room Size Needed: Minimum 4m x 4m for comfortable access
King size represents the sweet spot for many couples, offering significantly more space than a double whilst fitting in most British bedrooms. The extra 10cm length accommodates taller sleepers comfortably.
Super King Mattress
Dimensions: 180cm x 200cm (6' x 6'6") Best For: Spacious master bedrooms, couples who value space, families Room Size Needed: Minimum 4.5m x 4.5m
Super King provides the ultimate in sleeping space, equivalent to two single mattresses side by side. It's perfect for couples who want maximum space or families who occasionally sleep together.
How Do I Know What Size Mattress I Need?
Quick Answer: Choose based on who's sleeping (single person, couple), available room space, and height requirements. Couples should consider King size for comfort.
Selecting the right mattress size involves balancing several factors:
Who Will Be Using the Mattress?
Single Sleepers Most adults find a single mattress adequate for sleeping, but many prefer the extra space of a small double for comfort, especially if they're taller or move around during sleep.
Couples A double mattress is the minimum for couples, but many find it cramped. King size offers significantly more space, whilst Super King provides luxurious room for movement.
Families with Young Children If children occasionally join you for morning cuddles or bedtime stories, consider sizing up to accommodate these special moments comfortably.
What's the Difference Between UK and European Mattress Sizes?
Quick Answer: European sizes are typically 10cm longer (200cm vs 190cm) and use different width measurements, making bedding compatibility an important consideration. Mattresses from places such as Ikea are likely to be European sizes.
The differences between UK and European sizing can create confusion, especially when shopping online or moving between countries:
Length Differences
Most European mattresses are 200cm long compared to the UK standard of 190cm. This extra 10cm benefits taller sleepers but requires European-sized bedding.
Width Variations
European sizing uses different width categories that don't directly translate to UK equivalents:
- European Single: 90cm x 200cm
- European Double: 140cm x 200cm
- European King: 160cm x 200cm
Bedding Compatibility Considerations
If you choose European-sized mattresses, you'll need to source European bedding, which is increasingly available in the UK but may limit your options or increase costs.
How Much Room Space Do I Need for Each Mattress Size?
Quick Answer: Allow at least 60cm around the bed for movement, with larger rooms needed for wardrobes, dressers, and comfortable navigation.
Room planning involves more than just mattress dimensions:
Minimum Room Requirements
Essential Movement Space Allow minimum 60cm on at least one side of the bed for getting in and out comfortably. Ideally, provide this space on both sides for couples.
Door Opening Clearance Ensure bedroom doors can open fully without hitting the bed. Consider wardrobe doors, which often need more clearance than standard doors.
Furniture Accommodation Factor in space for essential furniture: bedside tables (typically 40-50cm wide), wardrobes (60cm+ depth), and dressers or desks if needed.
Optimal Room Layouts
Small Bedrooms (Under 3m x 3m) Best suited to Small Single or Single mattresses, with bed positioned to maximise remaining floor space.
Medium Bedrooms (3m x 3.5m to 4m x 4m) Can accommodate Small Double or Double mattresses comfortably, with space for essential furniture.
Large Bedrooms (4m+ x 4m+) Perfect for King or Super King mattresses with ample space for additional furniture and comfortable movement.
What Size Mattress Should Couples Choose?
When sharing a bed, size significantly impacts sleep quality and relationship harmony. Here's what couples should consider:
Space Per Person Analysis
Double Mattress: Each person gets approximately 67.5cm width - narrower than a single mattress King Mattress: Each person gets 75cm width - equivalent to a single mattress each Super King Mattress: Each person gets 90cm width - equivalent to a single mattress each with extra space
Sleep Style Considerations
Restless Sleepers If either partner moves frequently during sleep, larger sizes reduce disturbance. King or Super King sizes provide enough space for movement without affecting your partner.
Different Sleep Schedules Couples with different bedtimes or wake times benefit from larger mattresses that minimise disturbance when one person gets in or out of bed.
Temperature Preferences Larger mattresses allow couples with different temperature preferences to use different bedding weights without compromising each other's comfort.
How Do I Measure My Bedroom for a New Mattress?
Getting accurate measurements prevents costly mistakes and ensures your new mattress fits perfectly:
Essential Measurements to Take
Bed Frame Internal Dimensions Measure the internal space where the mattress sits, not the external frame dimensions. Check for any lips or edges that might affect mattress fit.
Room Dimensions Measure length and width of the room, noting any alcoves, bay windows, or irregular shapes that might affect furniture placement.
Door and Hallway Access Measure doorways, hallway widths, and stairway dimensions if you're on an upper floor. Consider tight corners or narrow passages.
Ceiling Height Important if you're considering elevated storage beds or loft-style arrangements.
Common Measuring Mistakes to Avoid
Assuming Standard Sizes Always measure rather than assuming your bed frame matches standard sizes. Older or imported frames may have unusual dimensions.
Forgetting About Access Routes A mattress that fits your room might not fit through your front door or up your stairs. Vacuum-packed delivery often solves this problem.
Not Accounting for Bedding Remember that thick mattress protectors, electric blankets, or mattress toppers add height that might affect fitted sheets or bed frame clearance.
UK vs European Mattress Sizes: Which Should I Choose?
The choice between UK and European sizing affects more than just the mattress:
Advantages of UK Standard Sizes
Bedding Availability UK sizes have the widest selection of readily available bedding in British shops, from budget to luxury options.
Furniture Compatibility
UK bed frames are designed for UK standard sizes, ensuring perfect fit without gaps or overhang.
Historical Architecture UK sizes often fit better in older British homes with smaller bedrooms and doorways.
Benefits of European Sizing
Extra Length The additional 10cm length benefits anyone over 6 feet tall, providing proper foot clearance.
Modern Appeal European sizes often fit better with contemporary bedroom furniture and design aesthetics.
Future Flexibility If you might move internationally or prefer imported furniture, European sizes offer broader global compatibility.
Mattress Sizes for Different Life Stages
Your ideal mattress size often changes as your circumstances evolve:
Young Adults and Students
Recommended: Single or Small Double Considerations: Budget constraints, temporary accommodation, easy transportation between homes
Students often prefer Single mattresses for university accommodation, upgrading to Small Double when space and budget allow.
Young Couples and New Homeowners
Recommended: Double or King Considerations: First home together, establishing long-term comfort, planning for growing needs
Many couples start with Double mattresses for budget reasons but quickly realise the benefits of upgrading to King size.
Established Families
Recommended: King or Super King
Considerations: Children visiting bedrooms, space for reading bedtime stories, long-term comfort investment
Families often appreciate the extra space for weekend morning family time and the improved sleep quality that comes with more space.
Older Adults
Recommended: King or Super King Considerations: Health conditions requiring more space, ease of access, potential for single sleeping due to sleep disruption
Older couples often benefit from larger mattresses that accommodate different sleep schedules and potential mobility aids.
Special Considerations for UK Homes
British housing presents unique challenges for mattress sizing:
Victorian and Edwardian Properties
Common Issues: Narrow staircases, small doorways, compact bedrooms Solutions: Vacuum-packed delivery, split mattresses for very tight access, careful measurement of all access routes
Many period properties have beautiful bedrooms that weren't designed for modern mattress sizes.
Modern New Builds
Typical Features: Larger bedrooms, standard doorways, open-plan layouts Opportunities: Can often accommodate King or Super King sizes that older properties cannot
Converted Flats and Loft Spaces
Considerations: Unusual room shapes, sloped ceilings, narrow access Solutions: Custom sizing options, careful height measurements, flexible delivery arrangements
The Sleep People's Approach to Sizing Solutions
Understanding that every customer's space and needs are unique, we've developed comprehensive sizing support across our brands:
Starlight Beds: Complete Size Range
Our family-focused brand offers every standard UK size plus European alternatives:
- All standard UK dimensions available
- European sizing for international preferences
- Clear size guidance to prevent ordering mistakes
- Competitive pricing across all size categories
The Foam People: Custom Sizing Expertise
Our memory foam specialists excel at non-standard sizes:
- Custom cutting for unusual bed frames
- Exact measurements for renovated properties
- Split mattresses for difficult access routes
- Precision sizing for caravans and motorhomes
Extreme Comfort: Value Across All Sizes
Proving that size doesn't have to compromise affordability:
- Excellent value pricing for larger sizes
- Quality materials regardless of dimensions
- No premium charges for less common sizes
- Straightforward sizing without confusion
FAQ: UK Mattress Sizes
What's the most popular mattress size in the UK?
Answer: Double mattresses (135cm x 190cm) remain most popular, followed closely by King size (150cm x 200cm) as bedrooms allow.
Do I need European bedding for a European-sized mattress?
Answer: Yes, European mattresses require European-sized bedding due to the different dimensions, particularly the 200cm length.
Can I put a smaller mattress on a larger bed frame?
Answer: Not recommended as this creates gaps that are uncomfortable and potentially unsafe. Always match mattress size to frame size.
How much bigger is a King size than a Double?
Answer: A King mattress is 15cm wider and 10cm longer than a Double, providing approximately 22% more sleeping space.
Will a Super King mattress fit up normal stairs?
Answer: Most Super King mattresses can navigate standard UK stairs when vacuum-packed, but always check your specific access route.
What size mattress should a 6-foot-tall person choose?
Answer: Anyone over 6 feet should consider King or European sizes for the extra 10cm length, providing proper foot clearance.
Are UK mattress sizes the same as US sizes?
Answer: No, US sizes use different measurements entirely. A US Queen is roughly equivalent to a UK King, whilst US King is closer to UK Super King.
Can I use UK bedding on a European mattress?
Answer: UK bedding may fit width-wise but will be too short length-wise for European mattresses, which are 10cm longer.
Making the Right Size Choice for Your Needs
Choosing the correct mattress size is one of the most important decisions in your mattress purchase. Too small, and you'll compromise comfort and sleep quality. Too large, and you might struggle with room layout or access issues.
The key is honest assessment of your space, needs, and future plans. A mattress is a long-term investment, so consider not just your current situation but how your needs might evolve over the next 8-10 years.
Remember that while budget constraints are real, the cost difference between sizes is often smaller than expected, especially when considered over the mattress's lifetime. The improved sleep quality and comfort from properly sized sleeping space usually justifies the additional investment.
Ready to Find Your Perfect Mattress Size?
Whether you need a space-saving Single for a compact room, a comfortable King for better couples' sleep, or a custom size for an unusual space, we're here to help you navigate the options and find the perfect fit.
Understanding mattress sizes is just the first step - choosing the right comfort level, materials, and features within your preferred size is where expertise really matters.
Want to see sizes in person? Currently out showroom is closed, however you can still visit us for expert advice and to view mattress samples.
Have an unusual space or requirements? Contact our sizing specialists who can help with custom solutions, difficult access routes, and non-standard sizing needs.
Ready to browse by size? Explore all our mattresses to see available options in your preferred dimensions, from budget-friendly to premium comfort levels.
The right size mattress is the foundation of great sleep. Let us help you find the perfect fit for your space, your needs, and your budget.