The Bed and Mattress Size Guide
UK Bed and Mattress Sizes
Choosing the right size Mattress for your Bed
You’ll need to ensure the length and width of your new mattress matches your frame or base. Which size bed and mattress are right for you depends on the room it's going in and how many people will be using it each night. Below we’ll explore the dimensions of each UK bed and mattress size plus advice for who each size is best suited.

What size is a Super King Bed and Mattress?

Super king beds and mattresses dimensions are 180cm wide and 200cm long (6ft wide by 6ft 6” in length). This is the largest bed we have available, which is perfect for families who like to squeeze in for breakfast in bed, or those who just value a lot of space! 

Best for: two people or more and those who like extra room.

What size is a King Size Bed and Mattress?

In metric measurements, a standard king size bed and mattress is 150cm wide and 200cm long (5ft wide by 6ft 6” length). 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 upgrade.

Best for: two people and those taller than 190cm or 6ft 2”.
What size is a Double Bed and Mattress?

Double beds and mattresses are 135cm wide and 190cm long (4ft 6” wide and 6ft 3” length). As the most common size for a bed and mattress, doubles are ideal for two people and fit in most bedrooms. 

Best for: two people and small to average sized bedrooms.
What size is a Small Double Bed and Mattress?

A small double bed and mattress is 120cm wide and 190cm long (4ft wide and 6ft 3” length). Also known as a queen size bed, they are most suited to sleeping one person but can accommodate two adults if necessary. If your bedroom is smaller than average, small double beds are ideal, especially if you choose a divan base which maximises storage space.

Best for: one person or couples with small bedrooms.
What size is a Single Bed and Mattress?

Single beds and mattresses measure 90cm wide and 190cm long (3ft wide and 6ft 3” length). As the name suggests, they’re ideal for one person and small bedrooms. They’re also great for children as they are cheaper, but still account for all growth spurts from roughly 4 years of age right through to teens.

Best for: one person.
What size is a Small Single Bed and Mattress?

Small single bed and mattresses dimensions are 75cm wide and 190cm long (2ft 6” wide and 6ft 3” length). Small singles are designed to fit narrower kids' bed frames and guest beds. They’re ideal for saving space and for spare rooms.

Best for: Children from roughly 4 years’ old, small rooms and guest beds.
What size is a Toddler Bed and Mattress?

Toddler beds and mattresses are 70cm wide and 140cm long. (2ft 3” wide and 4ft 6” length). They’re ideal for kids aged roughly between 1 and 4 years, especially those who need a little help changing from a cot to a single bed. 

Best for: Toddlers and kids’ character beds.
What size is a Cot Mattress?

Cot mattresses are 60cm wide and 120 cm long (23” wide by 47” length). These mattresses are designed for babies who sleep in a cot and best for the sleep needs of babies from birth to 3 years old. They’re usually 10cm deep and are firmer than adult mattresses. This helps your baby’s development, ensuring their spine is aligned during sleep, helping them grow properly.

Best for: Babies and toddlers who haven’t yet moved into a bed.
Mattress Size vs Bed Frame Size
When buying a new bed, you’ll want to ensure it fits in your room comfortably, so you’ll need to know which bed frames tend to have larger dimensions. Most often, these are metal and wooden bed frames as the mattress sits within the frame rather than on top of a base. However, we do advise you to always check the dimensions on any product before making your purchase.
Bed frame size according to style
The dimensions of your bed will differ depending on which style of bed frame you choose:
  • Divan beds without a headboard will have the same dimensions as your mattress as it will sit flush on top of the divan base.
  • Wooden bed frames are usually a few centimetres bigger than your mattress around each side.
  • Upholstered bed frame dimensions differ hugely depending on whether they have a sleigh shape, the amount of detail and the fabric.
Always check the dimensions of the bed before purchasing to ensure it fits in the room with enough space to move around the sides.

Euro Bed and Mattress Sizes

What size is a Euro Single Bed and Mattress?
A standard European single bed, often known as a twin bed, is 90cm wide and 200cm long (3ft wide and 6ft 6" length). This means twin beds and mattresses are a little longer than their UK counterparts but the same width. As a UK-based retailer, we don’t stock Euro beds or mattresses. However, if you do have an enquire, please get in touch at
What size is a Euro Small Double Bed and Mattress?
A European small double bed and mattress is 120cm wide and 200cm long (4ft wide by 6ft 6” length). Like their UK equivalent, they’re ideal for couples who have small bedrooms, teenagers, and if you want more sleeping space than a single bed offers.
What size is a Euro Double Bed and Mattress?
A European double bed and mattress measures 140cm wide and 200cm long. This is equal to 4ft 6” wide and 6ft 6” length. They’re the most common EU bed size, offering plenty of sleeping space without taking up too much room.
What size is a Euro King Size Bed and Mattress?
A European king size is bed 160cm wide and 200cm long (5ft 2” wide and 6ft 6” length). This makes Euro king size, a little wider than its UK equivalent. If you’ve got the room, they offer a luxurious amount of space in which to sleep – ideal for couples who need extra room to sleep. While we don’t sell EU king size beds and mattresses, we do sell a close equivalent. If you’ve not yet made up your mind, you should consider our king size beds and king size mattresses instead.
What size is a Euro Super King Size Bed and Mattress?
A Euro super king bed is 180cm wide and 200cm long (6ft wide and 6ft 6” length). This makes them the same size as UK super kings which provide the largest sleep space available of all beds. This makes them perfect for couples who need maximum space and comfort. Shop our super king beds and super king mattresses. These are the same size as EU super kings.
What Bed is best for your Guests?

Discover which bed is best suited for you accommodation style and type - we have a wonderful range of options to cover ever eventuality.
Compare all of our Mattress Types

Whatever you may be looking for, whether it is prince pocket to hybrid to Silentnight’s luxurious range at an affordable price, we have a variety of options that will suit both yours and your guests needs.
Make a statement in your Bedroom!

With a selection of different designs and thread counts, ensure your accommodation bedrooms look and feel welcoming with our great selection of bed linens.