UK Bed Sizes: The Full Guide for Bed & Mattress Sizes

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The Full Guide for Bed & Mattress Sizes

Your bed is an investment that can last you for years and promote healthier sleep. And that’s why buying a new one can be a tough decision.

Pick one that’s too small, you won’t sleep a wink. Pick one that’s too big, there’s not enough space in your bedroom. But with just the right size bed and mattress, you can find the perfect balance between comfort and efficiency.

This guide has everything you need to find the right bed and mattress size for you, your sleep habits, and your space. Choose a size below to get started.

UK Bed and Mattress Sizes

Not sure which bed & mattress size is best for your space? Use the guide below to find the perfect match when it comes to UK bed sizes.

Bed Sizes W x L (cm) W x L (ft)
Single Bed 90 x 190 3’0" x 6’3"
Small Single Bed 75 x 190 2’5" x 6’3"
Double Bed 135 x 190 4’5" x 6’3"
Small Double Bed 120 x 190 4’0" x 6’3"
King Bed 150 x 200 5’0" x 6’6"
Super King Bed 180 x 200 6’0" x 6’6"
Starter Bed 85 x 115 2’8" x 3’8"
Toddler Bed 70 x 140 2’3" x 4’6"
Shorty Bed 75 x 175 2’5" x 5’8"
Cot 60 x 120 2’0" x 4’0"

Single Bed Size

Suitable for

Single beds are versatile. But! Typically only for one person, hence the name. They’re great for solo sleepers and small spaces. Plus, many parents find they’re the ideal choice for kids, everywhere from pre-teens to teenagers.

Weight capacity of 250 - 300 pounds (113 - 159 kg).

Pros & Cons

  • Compact beds with small footprints
  • Great for solo sleepers and side sleepers
  • Ideal for smaller bedrooms
  • Not a ton of room to stretch out
  • Not great for couples
  • Can make large rooms look small

Duvet & Sheet Sizes

For single beds, choose duvet and sheets that are at least 125 x 200 cm. You can go bigger by just a few centimetres, but any more than that and your bed will swim in those sheets.

Room Size

If you have a small bedroom, guest room, office, or dorm room, go with a single bed. They're compact, so they're great for compact spaces.

Got a bigger room? Splurge on a bigger bed. Otherwise, your big room will look really small with a single bed.

Small Single Bed Size

Suitable for

Guest rooms, dorms, offices, and children’s bedrooms.

You can easily create more space in even smaller spaces with a small single bed. These are about the same size as single beds, but they’re a little more narrow.

Weight capacity of 250 - 400 pounds (113 - 181 kg).

Pros & Cons

  • Easy to move
  • Best for children
  • Space-saving
  • Affordable
  • Good for solo sleepers
  • Limited comfort
  • Limited lifespan
  • Fewer options
  • Too small for adults
  • Too small for couples

Duvet & Sheet Sizes

The good news is, the smaller the bed, the smaller the sheets — and smaller sheets are more affordable than bigger ones.

If you've got a small single or you're ready to buy one, make sure you buy sheets or duvet covers that are at least 140 x 200 cm for a comfortable fit.

Room Size

Small single beds are even more narrow than traditional single beds — but they're the same length.

So they'll fit in (very) small bedrooms, college dorms, and even offices that double as guest rooms.

Double Bed Size

Suitable for

Couples, people with pets, and solo sleepers who want some more room.

If you need a little more space, but don’t want a ton of extra length, go for the double bed. They’re as long as single beds, but offer a wider sleeping area.

Weight capacity is 500 - 800 pounds (227 - 362 kg).

Pros & Cons

  • Comfortably fit couples
  • Great for people with pets that sleep in the bed
  • Suitable for medium-sized rooms
  • Lots of options
  • Good for back- and side-sleepers
  • Difficult to move
  • Usually too big for small bedrooms
  • Same length as single beds
  • More expensive
  • Limited Privacy

Duvet & Sheet Sizes

Shopping for sheets or duvets for a double bed? Good news! It's a common size that's easy to find in most stores.

Look for anything that's 241 x 249 cm or just a smidge bigger. Sometimes sheets shrink or don't fit exactly as advertised — so a few centimetres bigger is ok.

Room Size

Double beds are best for standard-sized bedrooms, or those sized about 3.65 x 3.65 m. Of course, they can fit in larger rooms, but they'll look a little cramped in anything on the smaller size.

Small Double Bed Size

Suitable for

Anyone who wants the “sweet spot” between a single and a double.

Small doubles are the same length as singles and doubles, but sit right between the two in terms of width. Double beds are perfect for solo sleepers, and couples who sleep on their sides.

Weight capacity is 500 - 800 pounds (227 - 362 kg).

Pros & Cons

  • Compact size and footprint
  • Great for single people
  • Best for side sleepers
  • Good for small or oddly-shaped rooms
  • Easy to move
  • Not ideal for couples
  • More narrow than regular doubles
  • Not as common as double beds
  • Limited bedding options
  • More expensive

Duvet & Sheet Sizes

Small doubles are as long as traditional double beds but they're about 15 cm more narrow. As you shop for sheets, duvets, mattress covers, and so on, make sure you buy something that's 170 cm wide, and 200 cm long.

Room Size

Standard bedrooms are just shy of 4 x 4 m — and a double bed will fit perfectly inside those dimensions.

Small doubles can also fit in bedrooms slightly smaller, but it may be a bit tight.

King Bed Size

Suitable for

Couples, solo sleepers, tall people, co-sleeping families, or people with tons of pets.

Experience true luxury with a king-size mattress. These giants take up a ton of space — so you’ll need a big bedroom. But if you’ve got the dimensions, a king is great for pretty much anyone.

Weight capacity of 800 - 1,000 pounds (362 - 453 kg).

Pros & Cons

  • Big enough for families that co-sleep
  • Long enough for taller people
  • Wide enough for couples
  • Ideal for any type of sleeper/sleeping positions
  • More attractive than other kinds of beds
  • Bigger bed means bigger sheets
  • Not ideal for small bedrooms
  • More expensive bed frames
  • Difficult to assemble
  • Difficult to move

Duvet & Sheet Sizes

Shopping for a king bed or already have one? Make sure you pick up some sheets that are at least 282 x 249 cm. Anything smaller, and it'll be a tough fit.

You can shop for duvets and sheets that are a little bigger. But anything outside of a couple of centimetres and you'll need sheet fasteners to keep them in place.

Room Size

Large bedrooms are 4.2 X 4.8 m — sometimes a little bigger or a little smaller. But they're large enough to comfortably fit a king-size bed, mattress, and frame. King-size furniture is large — so make sure there's enough room for it all before you buy.

Super King Bed Size

Suitable for

Couples, families that co-sleep, people who want more space, and people who want a more luxurious sleeping experience.

Super king mattresses offer even more width than a traditional king mattress. Are you and your spouse both stomach sleepers? Are you in a family that co-sleeps? Or do you just like tons of extra space? Then a super king might be the right choice if you’ve got a big bedroom.

Weight capacity of 800 - 1,000 pounds (362 - 453 kg).

Pros & Cons

  • LOTS of extra room
  • Great for tall people and couples
  • More space for stomach and back sleepers
  • Look pleasant in large bedrooms
  • Can last a lifetime
  • Takes up a ton of space
  • Bedding is more expensive
  • Requires an extra large bedroom
  • Hard to move
  • Fewer options

Duvet & Sheet Sizes

If you're upgrading to a super king bed, you've got a ton of extra space to stretch out — and a bigger bed to make.

Super king beds are square, so you'll need square sheets measuring at least 282 x 249 cm. Some bedding measures a few centimetres more and that's ok — some materials shrink a little in the wash.

Room Size

You're going to need a really big bedroom to fit these really big beds. Super kings are 200cm in both directions or 2 m wide.

That will take up nearly the whole room if you've got a small or standard bedroom. That's why we recommend Super Kings for large and extra-large bedrooms instead.

Starter Bed Size

Suitable for

Kids, small bedrooms, and narrow spaces.

Transition your little one from a little mattress to a bigger one with a starter bed. These are perfect for smaller kids, smaller spaces, and people on a budget.

Weight capacity of 250 pounds (113 kg).

Pros & Cons

  • Transition little kids to bigger beds
  • Fit in small, narrow spaces
  • Cost-effective
  • Easy to move
  • Easy to assemble
  • Kids outgrow these fast
  • Difficult to repurpose
  • Only fit children
  • Limited storage space
  • Can be challenging to find in stores

Duvet & Sheet Sizes

Starter beds are about the same side as toddler beds, clocking in at 120 x 150 cm. We recommend purchasing duvets, sheets, and other bedding that's about the same size — maybe a few centimetres larger to accommodate shrinkage in the wash.

Room Size

Starter beds can fit in nearly any room size. But they're perfect for small, narrow spaces and children's bedrooms in particular. If the bed looks a little awkward at first, that's ok. Remember that it's a way to help your child transition from a crib or cot to a "big kid" bed.

Toddler Bed Size

Suitable for

Fit for ki