King Single & Double Bed Dimensions: The Complete Guide

Selecting the correct bed dimensions is a foundational decision that influences both the aesthetic harmony and functional comfort of a bedroom. Whether you are outfitting a spacious master suite or a compact guest room, understanding the specific measurements and practical implications of king single and double bed sizes is essential. This guide provides a detailed breakdown of standard dimensions, room layout strategies, and mattress options to help you make an informed choice.

The standard dimensions for these two popular configurations are distinct and serve different spatial and occupancy needs. A king single bed, also known as a single extra-long, measures approximately 1200mm in width and 2000mm in length. In contrast, a standard double bed, often referred to as a full-size bed, measures roughly 1350mm in width and 1900mm in length. While the double is wider, the king single is significantly longer, a distinction that caters to taller individuals who require extra legroom.

Comparing King Single and Double Dimensions

To visualize the differences and plan your space effectively, comparing the specifications side-by-side is the most efficient approach. The following table outlines the standard metric dimensions for both bed types, providing a clear reference for your planning.

UK Bed Sizes: Your Essential Guide for 2025 | Number One Beds ...
Bed Type Width (mm) Length (mm) Common Alternative Names
King Single 1200 2000 Extra Long Single, Super Single
Double 1350 1900 Full Size

Space Planning and Room Layout

Understanding the physical footprint is only part of the equation; integrating the bed into the room requires careful consideration of circulation space. For a king single bed, you should generally allow a minimum of 600mm of clearance on the sides for easy access and making the bed. Because of its extra length, ensure there is at least 600mm of space at the head of the bed to prevent a cramped feel and allow for a tall headboard.

Double beds present a different spatial challenge due to their greater width. While they occupy less lengthwise space, they require a wider room to maintain a balanced layout. Ideally, leave a minimum of 600mm between the edge of the bed and walls or furniture. In smaller rooms, positioning the bed so the headboard touches a central wall can create a more balanced visual anchor and preserve valuable floor space.

Mattress Compatibility and Comfort

Dimensions dictate comfort, and the right mattress is crucial for spinal support and rest quality. The king single’s extended length is specifically designed to accommodate taller adults, reducing the need to curl up during sleep. Standard sheets and bedding for this size are readily available, making it a practical choice for those who prioritize legroom without the full width of a double.

Double Sized Beds and Size Comparison – British Bed Store

Conversely, the double bed offers a compromise between space and sociability. The additional width allows for more freedom of movement and is suitable for couples who prefer to sleep close together or for individuals who simply value a wider sleeping surface. When shopping for linens, confirm the mattress depth, as thicker comfort layers can alter the fit of fitted sheets and require deeper pocket options.

Conclusion and Recommendation

Ultimately, the decision between a king single and a double bed hinges on a balance of personal physical requirements and the architectural constraints of your bedroom. If height is your primary concern and floor space is ample, the king single provides an excellent ergonomic solution. For those seeking a shared sleeping area or a more space-efficient arrangement in a moderate-sized room, the double bed remains a timeless and versatile choice.

Reference

Single: 92 cm (36 in) wide · Three-quarter: 107 cm (42 in) wide · Double: 137 cm (54 in) wide · Queen: 152 cm (60 in) wide · King: 183 cm (72 in) wide. Equal to the ...

UK Bed Sizes: Your Essential Guide for 2025 | Number One Beds ...

UK Bed Sizes: Your Essential Guide for 2025 | Number One Beds ...

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Reference

UK BED / MATTRESS SIZES, IMPERIAL AND METRIC DIMENSIONS ; Small Single Bed, 2'6″ x 6'3″ (75 x 190cm) ; Single Bed, 3' x 6'3″ (90 x 190cm) ; Small Double Bed, 4' x ...

Double Sized Beds and Size Comparison – British Bed Store

Double Sized Beds and Size Comparison – British Bed Store

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Reference

Bed sizes ; Single beds, 90 x 190 cm ; Double beds, 135 x 190 cm ; King beds, 150 x 200 cm ; Day beds, 80 x 200 cm ; Sofa beds, 140 x 200 cm.

King Size Bed Dimensions Mattress Sizes Chart And Bed Dimensions Guide

King Size Bed Dimensions Mattress Sizes Chart And Bed Dimensions Guide

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Reference

King size bed dimensions ... The king size bed dimensions are 183cm x 203cm. It's our largest traditional sized bed and is best for couples or individuals in ...

Bed Sizes & Mattress Dimensions (Buying Guide) | Castlery Australia

Bed Sizes & Mattress Dimensions (Buying Guide) | Castlery Australia

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Reference

A single mattress is usually a mattress that is not as wide as a double mattress and not as long as a king-size mattress. Single mattresses often come with bed ...

King Bed Mattress Measurements

King Bed Mattress Measurements

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Reference

12.01.2023 ... A 1830mm x 2030mm king-size bed is the epitome of luxury, as there's enough room for two people to spread out and still have their own private ...

Mattress Size Guide | Bed Size Guide | Mattress Dimensions Australia

Mattress Size Guide | Bed Size Guide | Mattress Dimensions Australia

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Reference

15.08.2024 ... Understanding Bed Sizes: King Single and Double · king single: Typically measures 107cm x 203cm (42″ x 80″). · double: Usually comes in at 138cm x ...

Mattress Size Guide: Australian Standard Dimensions

Mattress Size Guide: Australian Standard Dimensions

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Reference

Germany - Standard Size ; 90 x 200 cm. Single bed. 140 x 200 cm for a small drop of 25 cm ; 2 times 90 x 200 cm (Standard double bed). 240 x 220cm for a large ...

What Is The Size Of A Double Bed Sheet - Free Printable Download

What Is The Size Of A Double Bed Sheet - Free Printable Download

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Reference

Best for: kids, bunk beds or single sleepers.

Design Guide to Optimizing Bedroom Size and Layouts

Design Guide to Optimizing Bedroom Size and Layouts

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Reference

22.04.2025 ... The 160x200 cm size, recognized as a queen size dimension, offers more space for each sleeper, while the 180x200 cm option (king size) provides ...

Mattress Dimensions And Bed Sizes at Greta Pickard blog

Mattress Dimensions And Bed Sizes at Greta Pickard blog

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Reference

10.07.2025 ... Note: EU Single is longer than most national single sizes; it's great for taller sleepers or fitted beds. 2. EU Double Mattress (140 x 200 cm / ...

Imperial And Metric Mattress Sizes Bed And Mattress Sizes Guide UK

Imperial And Metric Mattress Sizes Bed And Mattress Sizes Guide UK

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Reference

19.04.2025 ... Bed sizes in #English 🛏️ . 1.9K. Dislike. 44. Share. Video unavailable. This content isn't available. Skip video.

What Size Is A Double Bed? – UK Bed Sizes: The Bed And Mattress Size ...

What Size Is A Double Bed? – UK Bed Sizes: The Bed And Mattress Size ...

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Reference

King size beds and longer than double beds, making them perfect if you're a taller person who needs the extra leg room, or for couples looking for a spacious ...

What Size Are Single Bed at Bella Ornelas blog

What Size Are Single Bed at Bella Ornelas blog

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Reference

Double bed size: A comfortable option for couples with limited floor space or solo sleepers who love extra space. Measuring 137 cm x 188 cm. Queen bed size: The ...

What Are the Most Common Bed Sizes? - Wayfair Canada

What Are the Most Common Bed Sizes? - Wayfair Canada

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Reference

The European or continental basic sizes are similar to the UK's version but have a set length of 200 centimeters. The terms queen, king and super king are not ...

UK Bed and Mattress Sizes - Large diagram

UK Bed and Mattress Sizes - Large diagram

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Reference

Measuring in at 180cm wide and 200cm long or equally 6 feet wide and 6 feet 6 inches long, the super king is the largest of all standard UK sizes. The super ...

UK Bed Measurements for Singles, Doubles, Queens, Kings and Super Kings ...

UK Bed Measurements for Singles, Doubles, Queens, Kings and Super Kings ...

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Reference

Standard Bed and Mattress Sizes ; King Single Mattress. 107 x 203. 41.5″ x 79.9″ ; Double Mattress. 137 x 188. 53.9″ x 74″ ; Long Double Mattress. 137 x 203. 53.9″ ...

The Ultimate Mattress Size Guide: Which One Is Right for You? - Sinyora ...

The Ultimate Mattress Size Guide: Which One Is Right for You? - Sinyora ...

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Reference

King mattresses are sized at a luxurious 1830mm across, giving both you and your partner close to a single bed's worth of sleeping space each! (Find out how ...

Single Bed Mattress Dimensions

Single Bed Mattress Dimensions

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Reference

European & British Mattress & Bed Sizes ; EU - Single Extra Long, 90 x 210 cm ; EU - Small Double, 120 x 200 cm ; EU - Double, 140 x 200 cm ; EU - King, 160 x 200 ...

Single Bed To King Size - Kaley Furniture

Single Bed To King Size - Kaley Furniture

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Reference

Bed Size & Home Measuring Guide - Will it fit? ; Double, 4'6" x 6'3", 54" x 75", 135cm x 190cm ; King, 5' x 6'6", 60" x 78", 150cm x 200cm.

King Bed Dimensions & Drawings | Dimensions.com

King Bed Dimensions & Drawings | Dimensions.com

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