Mattress Sizes in the UK: Find the Perfect Fit for Your Sleep

Written by Nectarsleep Editorial Team

Last updated on Sep 23, 2025

Better Sleep Blog
Mattress Sizes in the UK: Find the Perfect Fit for Your Sleep

In this article:

Choosing the right mattress size can make all the difference to your sleep quality. Whether you’re furnishing a cosy guest room, upgrading your child’s bed, or treating yourself to a spacious sleep sanctuary, knowing the dimensions and who each size is best suited for is essential.

Here’s a simple guide to UK mattress sizes and how to find your perfect match.

Save Up to 50% On Mattresses!*

*See Terms.
Shop Mattress

Small Single Mattress Size (75 x 190 cm)

The small single is a compact option, ideal for young children, smaller bedrooms, or bunk beds. It offers just enough space for one sleeper without taking up too much floor area.

Best for: Kids, occasional use in guest rooms, or homes where space is at a premium.

Single Mattress Size (90 x 190 cm)

A standard single gives a little more room to stretch out than a small single. It’s a great choice for older children, teenagers, or solo adults who don’t need extra width.

Best for: Teenagers, single adults, or guest bedrooms.

Small Double Mattress Size (120 x 190 cm)

Also known as a “three-quarter bed,” the small double is wider than a single but not quite as large as a double. It’s perfect for one sleeper who likes extra space, or for couples who don’t mind getting cosy.

Best for: Solo sleepers who enjoy more room, or couples in smaller bedrooms.

Double Mattress Size (135 x 190 cm)

The standard double is one of the most popular mattress sizes in the UK. It offers enough room for two people without overwhelming the average bedroom.

Best for: Couples, or individuals who want more space than a single or small double provides.

King Mattress Size (150 x 200 cm)

With extra length and width, the king mattress delivers plenty of space to spread out. It’s especially helpful for taller sleepers or couples who want a little more breathing room.

Best for: Couples, taller adults, or anyone who values luxurious space at night.

Super King Mattress Size (180 x 200 cm)

The ultimate in bedroom luxury. A super king offers the most sleeping space available in the UK, giving couples room to stretch out without ever disturbing one another.

Best for: Couples who want maximum comfort, families who share the bed with children or pets, and anyone with a large bedroom to fill.

Finding Your Perfect Fit

Your mattress size sets the foundation for your sleep. Think about your room size, how many people will be sharing the bed, and how much space you like at night. Whether it’s a space-saving single or a sprawling super king, Nectar has the perfect mattress to help you sleep better.

Back to blog