Mattress Size Guide UK

Not sure what mattress size you need? Fear not! We’re here to help. Getting the size right is key to a great night’s sleep and making sure your bed fits your room just right. Whether you’re furnishing a snug box room, upgrading your main bedroom, or buying for a growing teen, knowing your UK mattress sizes will help you make a smart choice.

At Time4Sleep, we offer a wide range of comfy, high-quality mattresses in all standard UK sizes. This guide is here to walk you through your options, so you can find the perfect fit for your space, sleep habits, and lifestyle. Dreamy sleep awaits!

UK Mattress Sizes Chart

From Singles to Super Kings – and everything in between – mattress sizes can be a bit confusing! That’s why we’ve put together this handy guide to help you make sense of UK mattress size names and their dimensions.

Just a heads up: sizes can vary internationally, so the info here is based on UK standards.

How to choose the right mattress size

Not sure what size mattress you need? We don’t blame you. Choosing the right size can make a big difference to your comfort, your sleep, and how your room feels. Here’s what to consider when picking the perfect fit from our full range of mattress sizes UK:

1. Room size matters

Before you set your sights on a King or Super King, make sure your space can handle it! You’ll want around 60–70cm of clearance around the bed to move comfortably. For smaller rooms, a Single or Small Double is a great space-saving option. Got more room to play with? Treat yourself to the luxury of a larger mattress.

2. Your sleeping setup

Do you sleep alone, with a partner, or even with a pet who sneaks in during the night? Are you a still sleeper or do you toss and turn? If you share your bed or need more room to spread out, upgrading your mattress dimensions can really help improve your sleep quality.

3. Height and build

Taller sleepers will love the extra length a King or Super King offers. If you're broader or just like some personal space while you snooze, going wider makes a noticeable difference.

4. Think long term

Are you buying for a child, teen, or spare room? A Small Double can be the ideal middle ground. Not too big, not too small, and flexible enough to adapt as needs change.

Still wondering what size mattress is best for you? Browse all our UK mattress sizes and find your perfect match today.

Do UK and EU mattress sizes differ?

Yes, UK and EU mattress sizes are slightly different. EU mattresses are typically a few centimetres longer or wider than their UK counterparts, which can cause fitting issues with UK bed frames.

IKEA beds often follow EU sizing, so it's essential to check your frame dimensions before purchasing.

Want more details? Read our other bed and mattress size guides for all the info:

• European Bed & Mattress Size Guide

• IKEA Bed Size Guide

Tips for measuring your space

Before you fall head over heels for a new mattress, it’s worth making sure it’ll actually fit your space. Here are some handy and often overlooked tips to help you get the best fit, both for your room and your sleep setup.

1. Grab your tape measure – and be thorough!

Start by measuring your bedroom floor space from wall to wall. Focus on the area where your bed will go, and don’t forget to check the width and length, these are key when comparing UK mattress dimensions.

2. Don’t forget the extras

Remember, your bed setup isn't just a mattress! It likely comes with a headboard, maybe some underbed storage, and probably a couple of bedside tables too. Be sure to factor in the extra space these bits take up, so you're not left with a beautiful bed you can't walk around.

3. Give yourself room to move

We recommend leaving at least 60–70cm of clearance around each side of the bed (and at the foot) to walk comfortably about your room and make your bed without having to bend into some complex yoga pose. This is especially important if your bedroom’s on the smaller side or you share the space.

4. Think beyond the bedroom

Your mattress has to get into the room first! Take a moment to measure staircases, doorways, and tight corners. This is especially important if you’re ordering a King or Super King mattress, as these larger sizes can be tricky to manoeuvre in tighter homes.

5. Ask us anything

Not sure if a certain mattress size will work in your space? Just ask! Our friendly team is always happy to help with advice, measuring tips, and finding the right fit based on your needs. Get in touch.

Mattress Size FAQs

1. What’s the most popular mattress size in the UK?

The Double mattress (135 x 190cm) is the most common, ideal for couples and guest rooms.

2. Can two adults sleep on a Double bed?

Yes, but it can feel snug. For more space, consider a King or Super King.

3. Is a Super King mattress worth it for couples?

Absolutely – it offers generous space, especially if one or both partners are restless sleepers.

4. Will a King size mattress fit up the stairs?

Most homes can accommodate a King mattress, but always measure stairwells, doorways, and tight corners before ordering.

5. Are mattress sizes standardised?

Yes, in the UK, mattress sizes follow standard dimensions – but EU sizes may differ, so always double-check.

Searching for more ways to boost your sleep quality?

At Time4Sleep, we’re committed to helping you sleep better, and that starts with finding the perfect mattress. Whether you're looking for a compact Single or a luxurious Super King, we have something for everyone.

Explore our full range of mattresses by size, or get in touch with our team if you need expert advice.

And if you’re looking for more bedroom inspiration, browse our blog here!