Bed size guide

When you’re looking for a new bed frame, divan bed or mattress, it’s important to choose the one that’s right for you and the best fit (literally), for your bedroom. Our guide is here to help you decide the best size for your room, that leaves you sleeping easy.

What sizes are available?

From smallest to largest, the four most common sizes of bed or mattress are single, double, kingsize and super kingsize. There are some additional size choices for mattresses and bed frames, including small double, shorty and toddler.

Mattress size vs frame size

The size of a mattress and bed frame will always match; meaning a double mattress will fit on a double bed frame and so on. There’s no matching required with a divan bed, as it is a mattress and bed frame all-in-one.

Choosing a mattress or divan bed?

The size is generally standardised, meaning wherever you buy from in the UK – it should be the same size. The size of bed frames can vary depending on the design, so the sizes below are only for mattresses and divan beds. And remember, a mattress should always fit on a bed frame of the same size.

Bed sizesShop all beds and bed frames

Single bed size

  • Width 90cm, length 190cm
  • Single beds, as expected, are designed just for one person.
Shop single bed framesShop single divan beds

Double bed size

  • Width 135cm, length 190cm
  • The measurements for a standard double bed are the same length as a single, but wider. Ideal for couples, or individuals that like to stretch out.
Shop double bed framesShop double divan beds

Kingsize bed size

  • Width 150cm, length 200cm
  • Kingsize beds are wider and longer than doubles. Great if you’re tall, or don’t like fighting for the covers.
Shop king size bed framesShop king size divan beds

Superking bed size

  • Width 180 cm, length 200cm
  • Superkings are even wider than a kingsize, but are the same length.
Shop superking size bed framesShop superking size divan beds

Small double bed size

  • Width 120 cm, length 190cm
  • Small doubles are a narrower style of double bed, perfect if you’re short on space in a bedroom. 
Shop small double bed framesShop small double divan beds

Shorty bed size

  • Width 75cm, length 175cm
  • Shortys are a type of single bed with less width and length, designed as a first proper bed for older children.
Shop shorty beds

Toddler bed size

  • Width 70cm, length 140cm
  • Toddler beds are even smaller than shortys and are best suited to younger children.
Shop toddler beds

Shop by type


View our range of mattresses, including single, double, kingsize, superking, small double, shorty and toddler sizes.

Shop mattresses

Bed frames

Just in need of a new bed frame to match your mattress? Choose from single, double, kingsize,  superking and small double options.

Shop bed frames

Divan beds

Choose a Divan bed for the whole bed frame and mattress in one. They’re available in single, double, kingsize, superking and small double sizes.

Shop divan beds

More bed buying considerations

To me, to you

There are two main considerations when choosing the right bed size. Firstly, will it fit in the room of your choice? You might like the room and comfort that a larger bed offers, but how much space will that leave for any wardrobes or other bedroom furniture? The second consideration is whether you can get it to its new home. Will the bed or mattress fit through your front door and up any stairs?

Don't get cold feet

If you’re a touch on the tall side, you might want a bed that doesn’t leave your feet dangling, or leaving you having to sleep diagonally. Kingsize beds offer 10cm more length than a double, which might be the difference between waking up to cold feet or not.

Out with the old

We offer a mattress recycling service, where you can pay to have your old one taken away. When you add mattress to your trolley, you'll be given the option to have your old one removed when the new one is delivered. This service doesn't apply to headboards, bed frames or divan beds, so make sure to remove these before your order arrives.

More ideas and inspiration

Mattress buying guide

How to choose the right mattress for your bed.

See our mattress guide

What is a mattress topper?

See the benefits that a mattress topper can have on your sleep.

Discover more about mattress toppers

What is a divan bed?

Need some help deciding if you want a divan bed?

Find out more about divan beds

Bedroom ideas

All you need for a full bedroom revamp.

Get inspired now

Why buy at Argos?