Bed Size Guide

Do you ever get confused with all the different bed sizes available? You’re not alone. With so many options—king, queen, 3/4 bed, European double, and more—it’s easy to feel overwhelmed when trying to find the perfect fit for your space and sleeping style.

Getting the right bed frame size is essential. If you’ve invested in a great mattress, the wrong frame can make it uncomfortable or even damage it over time. That’s why we’ve created this all-in-one Bed Size Guide—to break down widths, lengths, and measurements in simple terms so you can confidently choose the bed that’s right for you.

Looking for mattress dimensions instead? Check out our Mattress Size Guide for help choosing the perfect match.

Bed Size Chart: (Smallest to Largest)

Bed Size	Width	Length
Cot Bed	1’9″ (53cm / 21″)	4’0″ (120cm / 48″)
Toddler Bed	2’3″ (70cm / 27″)	4’6″ (140cm / 54″)
Small Single	2’6″ (76cm / 30″)	6’3″ (190cm / 75″)
Single	3’0″ (90cm / 36″)	6’3″ (190cm / 75″)
European Single	3’0″ (90cm / 36″)	6’6″ (200cm / 78″)
Small Double / Queen	4’0″ (120cm / 48″)	6’3″ (190cm / 75″)
3/4 Bed	4’0″ (120cm / 48″)	6’3″ (190cm / 75″)
Double	4’6″ (135cm / 54″)	6’3″ (190cm / 75″)
European Double	4’7″ (140cm / 55″)	6’6″ (200cm / 78″)
King Size	5’0″ (150cm / 60″)	6’6″ (200cm / 78″)
European Queen	5’3″ (160cm / 63″)	6’6″ (200cm / 78″)
European King	5’3″ (160cm / 63″)	6’6″ (200cm / 78″)
Super King	6’0″ (180cm / 72″)	6’6″ (200cm / 78″)

UK Bed Sizes Explained

What Size is a Cot Bed?

A cot bed typically measures (1’9″ x 4’0″) (53cm x 120cm or 21″ x 48″), making it the perfect first sleeping space for infants and small toddlers. It offers a snug, secure area for your baby to sleep soundly during the early years. Cot beds are smaller than standard beds, which makes them ideal for nurseries or tight spaces.

What makes cot beds especially practical is their ability to convert into toddler beds by removing the side rails. This helps parents extend the life of the bed while easing their child’s transition from a crib to an open toddler bed. They’re a popular choice among parents looking for functionality and value.

What Size is a Toddler Bed?

A toddler bed is slightly larger than a cot, measuring approximately 2’3″ x 4’6″ (70cm x 140cm or 27″ x 54″). It’s designed as a gentle step up for children who have outgrown their cot but aren’t quite ready for a single bed. These beds are typically low to the ground, making it safer and easier for little ones to climb in and out independently.

Many toddler beds come with guardrails to prevent accidental roll-outs during the night. Their compact size is great for smaller bedrooms and still provides plenty of comfort for toddlers aged 2 to 4 years old. Some models even reuse the cot mattress, offering a budget-friendly upgrade.

What Size is a Small Single Bed?

A small single bed measures 2’6″ x 6’3″ (76cm x 190cm or 30″ x 75″), making it ideal for young children, small bedrooms, or guest spaces. It offers more length than a toddler bed, allowing for a comfortable sleep as children grow taller.

Despite its compact width, a small single can be surprisingly comfortable for smaller or shorter adults as well. It’s often used in caravans, holiday homes, or even shared rooms where saving space is key. With a full-length mattress, this bed strikes a balance between space-saving and comfort.

What Size is a Single Bed?

The standard single bed in the UK measures 3’0″ x 6’3″ (90cm x 190cm or 36″ x 75″). It’s one of the most versatile and popular sizes, used for children, teenagers, solo adults, and guest rooms alike. It offers just the right balance of space and practicality.

Single beds are also commonly used for bunk beds or day beds and are widely available in a variety of styles and frame types. They provide ample room for a single sleeper without taking up much floor space, making them perfect for flats and smaller bedrooms.

What Size is a Small Double or Queen Bed?

A UK small double bed—also known as a queen or ¾ bed—measures 4 foot x 6 foot 3 inches (4’0″ x 6’3″), which is 120cm x 190cm or 48″ x 75″. This bed size is a popular choice for smaller bedrooms or apartments where floor space is limited. Though slightly narrower than a standard double, it often looks very similar, which is why “What size is a small double bed?” is a frequently asked question among shoppers.

Browse our collection of small double beds here.

What Size is a Double Bed?

The standard double bed in the UK measures 4’6″ x 6’3″ (135cm x 190cm or 54″ x 75″), making it the most commonly purchased bed size for couples. It comfortably fits two people, though it can feel a bit cozy if you’re used to spreading out.

Double beds are ideal for average-sized rooms and offer more sleeping space for solo sleepers who like to stretch. They’re also easy to accessorize, with the widest availability of bedding, frames, and mattresses in this size.

What Size is a King Size Bed?

A UK king size bed is generously sized at 5’0″ x 6’6″ (150cm x 200cm or 59″ x 79″), offering both extra width and length compared to a double. It’s an excellent choice for couples who prefer more personal space during sleep or for taller individuals needing that extra legroom.

King beds often serve as the centerpiece of a master bedroom, combining style and function. They’re perfect for people who toss and turn or sleep with kids or pets. Just be sure your bedroom has enough space to comfortably accommodate this larger frame.

What Size is a Super King Bed?

The super king is the largest standard UK bed size, measuring 6’0″ x 6’6″ (180cm x 200cm or 72″ x 78″). It’s the ultimate in comfort and space, offering ample room for couples and even co-sleeping families. It’s especially beneficial for light sleepers who don’t want to be disturbed by a partner’s movement.

Super king beds are often found in luxury bedrooms and premium hotel suites. While they take up more floor space, the luxurious sleeping experience they offer is worth it—especially if restful sleep is a priority.

European Bed Sizes

European bed sizes may look similar to standard UK beds at first glance, but they tend to be longer, making them a popular choice for taller individuals or anyone who prefers a bit more legroom. Whether you’re furnishing a modern bedroom or shopping for a replacement mattress, knowing the exact dimensions can make all the difference.

Discover the key differences in European bed sizes below.

European Single Bed Size

A European single bed measures 3 foot x 6 foot 6 inches (3’0″ x 6’6″), which is 90cm x 200cm or 36″ x 78″. That’s three extra inches in length compared to a standard UK single, making it a great option for teenagers or adults who need more leg space.

Its practical size makes it a popular choice for guest rooms, small apartments, and children’s rooms. If you’re on the taller side, this could be the perfect single bed for you.

European Double Bed Size

A European double bed is slightly wider and longer than a UK double, measuring 4 foot 7 inches x 6 foot 6 inches (4’7″ x 6’6″), equivalent to 140cm x 200cm or 55″ x 78″. It’s one of the most common sizes across Europe and provides that extra bit of room that couples often look for.

The added length makes it ideal for taller sleepers or anyone who prefers a little more space to stretch out.

European Queen Size Bed

A European queen-size bed measures 5 foot 2 inches x 6 foot 6 inches (5’2″ x 6’6″), or 160cm x 200cm / 64″ x 78″. Compared to the UK version, it’s both wider and longer, offering generous sleeping space without overwhelming most standard bedrooms.

This size is perfect for couples who value comfort and movement without stepping up to a full king-size.

European King Size Bed

European king-size beds come in at 5 foot 3 inches x 6 foot 6 inches (5’3″ x 6’6″), which is 160cm x 200cm or 63″ x 78″. That little bit of extra length makes a noticeable difference for taller individuals or anyone who likes a roomy sleep.

When opting for a European bed frame, it’s essential to pair it with a European-sized mattress to ensure a snug fit. Using a UK mattress on a European frame could leave gaps, causing the mattress to shift during the night.

UK vs US Bed Sizes:

If you’ve ever wondered, “Are UK and US bed sizes the same?” — you’re not alone. It’s a common question we get at Super Beds. While the names might sound similar, there are subtle but important size differences between UK and US beds. Generally, beds in the US run slightly larger than those in the UK, especially in length.

To help you find the perfect fit—whether you’re shopping for a new bed frame or mattress—we’ve put together a simple comparison of the most popular UK and US bed sizes:

Bed Size	US Dimensions	UK Dimensions
Single	3’2″ x 6’2″ (97cm x 188cm / 38″ x 74″)	3’0″ x 6’3″ (90cm x 190cm / 36″ x 75″)
Double	4’6″ x 6’2″ (135cm x 188cm / 54″ x 74″)	4’6″ x 6’3″ (135cm x 190cm / 54″ x 75″)
Queen (US) / King (UK)	5’0″ x 6’8″ (150cm x 203cm / 60″ x 80″)	5’0″ x 6’6″ (150cm x 200cm / 60″ x 78″)
Super King	6’4″ x 6’8″ (193cm x 203cm / 76″ x 80″)	6’0″ x 6’6″ (180cm x 200cm / 72″ x 78″)

Ready to Find Your Perfect UK Size Bed?

Now that you’ve got a clear understanding of UK bed sizes through this bed size guide—from small single to super king—you’re one step closer to creating your ideal sleep space. Whether you’re furnishing a child’s room, upgrading your guest space, or treating yourself to a luxurious king-size retreat, we’ve got the right fit for every room and lifestyle.

Explore our full range of UK-sized beds, including space-saving ottoman beds, elegant divans, and compact styles for smaller rooms. At Super Beds, better sleep starts with the perfect size and style.