Bed and mattress size guide

Getting a good night’s sleep is integral to your happiness, health and wellbeing. So as well as choosing the right mattress comfort level, choosing the right size bed and mattress for your needs is one of the most important decisions you will need to make when updating your bedroom.

We’ve created a helpful guide to bed and mattress sizes inside and outside the UK so you can make the best decision for yourself.

UK bed and mattresses dimensions chart

When looking for the perfect UK bed and mattress, it’s important that you familiarise yourself with the measurements for each type of bed so that you can ensure your bed and mattress fit.

Bed and mattress measurements

Size Dimensions (cm) Dimensions (feet)
Super King 180 x 200* 6’0” x 6’6”*
King 150 x 200* 5’0” x 6’6”*
Double 137 x 190* 4’6” x 6’3”*
Small Double 122 x 190* 4’0” x 6’3”*
Single 91 x 190* 3’0 x 6’3”*
Small Single 75 x 190* 2’6 x 6’3”*
Toddler 70 x 140* 2’3” x 4’6”*
Cot 60 x 120* 23” x 47”*
*Measurements provided in the table above are offered as reference only. We would recommend checking with your current manufacturer for measurements to ensure compatibility.

Bed and mattresses size in the UK

Let’s take a closer look at each of the UK standard-size mattresses outlined above.

What size is a super king size bed and mattress?

Super king beds and mattresses are 180cm wide and 200cm long. This is the largest bed that you can purchase in the UK.

Ideal for couples that enjoy extra space when they sleep (who doesn’t love to starfish?), or families that find their little ones love nothing more than creeping into their bed in the middle of the night, a super king size bed and mattress is more than accommodating. Just make sure that you have enough space for a super king in your bedroom as they can easily overpower a space.

What size is a king size bed and mattress?

A standard king size bed and mattress in the UK measures 150cm wide and 200cm long.

They are perfect for couples and families that enjoy the luxury of extra space at bedtime but don’t want to overwhelm their bedroom with a super king. If you require extra leg room compared to a double bed, a king size bed and mattress is a great option.

What size is a double size bed and mattress?

Double beds and mattresses in the UK measure 137cm wide and 190cm long. Double beds can comfortably fit two people.

They are the most common type of bed and mattress in UK bedrooms. Still offering plenty of space, doubles are a more popular choice than a king and super king as they require less space in the bedroom, but still offer plenty of room and comfort at night.

Large bed with two bedside tables

What size is a small double size bed and mattress

A small double bed and mattress is 122cm wide and 190cm long. This size of bed is the preferred choice for individuals who sleep alone but want more space, and couples who have limited space in their bedroom but still wish to share the same bed.

What size is a single size bed and mattress?

Single beds and mattresses measure 91cm wide and 190cm long, and they are designed to accommodate one person comfortably.

Single beds are a great option for young children and can see them through to their teenage years. They are also ideal for single adults, spare bedrooms, and those with limited space.

What size is a small single size bed and mattress?

A small single bed and mattresses is 75cm wide and 190cm long. Designed to fit narrower kids’ bed frames, they are a great space-saving option!

What size is a toddler size bed and mattress?

A toddler bed and mattress is 70cm wide and 140cm long. Toddler beds are designed to accommodate the sleeping needs of children between 1 and 4 years old.

What size is a cot size bed and mattress?

Cot mattresses are 60cm wide and 120 cm long. They are designed for babies and are often used from birth up until around 3 years old. Cot mattresses are a lot firmer than standard ones to ensure that your baby’s spine aligns correctly during the night.

Baby asleep in a cot bed

Bed and mattress sizes outside the UK

If you’re shopping for a new bed and mattress outside of the UK, or are looking to import your new mattress, you should also familiarise yourself with sizes used in the EU and beyond.

What size is a Queen size bed and mattress?

Similar to a small double, a queen size mattress, is 122cm (60 inches) wide by 190cm (80 inches) long.

What size is a California king size bed and mattress?

A California king is being longer than a standard bed, making it a great option for taller individuals. Measuring 183cm (72 inches) by 213.5cm (84 inches), this type of bed is large enough to fit two adults comfortably, with plenty of leg room.

Custom size beds and mattress

Here at Custom Size Beds, we specialise in providing high-quality, super comfy, custom-size mattresses and bed frames, meaning you will also be able to find the perfect fit for your room.

After all, the challenge of fitting a bed frame into a tight space can be both frustrating and sometimes impossible. The good news is that we can help. Armed with vast experience in providing made-to-measure, custom beds for a wide variety of different-sized rooms and tricky spaces, we offer a range of bespoke bed frames that can be cut to almost any size. We offer the very best quality beds at the best possible prices.

Whether you have a box room that won’t fit a standard size bed frame, or you want to make the most of the available space in a room, our made-to-measure bed frame service can help.

We can also provide mattresses, including round and short mattresses for beds that require unique sizes including those found in caravans, motorhomes, campervans, boats, trucks and hotels.

Get in touch today to find out how our expert team can help you to find the perfect bed and mattress.