The Ultimate Guide to Mattress Sizes in Ireland

Last updated 27th August 2025

Quick Answer: The standard Irish mattress sizes are Single (90 x 190cm), Small Double (120 x 190cm), Double (135 x 190cm), King (150 x 200cm), and Super King (180 x 200cm). Each size is suited to different needs, from children’s bedrooms to spacious master suites.

Selecting the right size mattress directly impacts your sleep quality, bedroom layout, and comfort. Below, we break down every Irish mattress size with dimensions in both centimetres and feet/inches, plus tips on choosing the best fit for your lifestyle.

Understanding Mattress Sizes in Ireland

When choosing a  mattress, it helps to have a clear reference of the standard Irish sizes before diving into the details. The chart below provides a quick comparison of each option, showing dimensions in both centimetres and feet/inches.

With this overview in mind, let’s look at each mattress size in more detail:

Single Mattress (3ft) – 90 x 190cm / 3’3” x 6’3”

Ideal for children, teenagers, or solo sleepers, a single 3ft mattress fits smaller rooms, guest bedrooms, or studio apartments. It’s space-efficient while still offering comfort for one person.

Small Double Mattress (4ft) – 120 x 190cm / 4’0” x 6’3”

A great step up from a Single, the small double 4ft mattress provides extra room for solo sleepers or couples with limited bedroom space. Common in guest rooms, it balances comfort with space-saving.

Double Mattress (4ft 6) – 135 x 190cm / 4’6” x 6’3”

The most popular mattress size in Ireland, the double 4ft 6 mattress suits couples in standard bedrooms. It’s versatile, offering comfort without taking up excessive space.

King Mattress (5ft) – 150 x 200cm / 5’0” x 6’6”

A luxurious choice for couples, the king-size 5ft mattress offers extra width and length, ideal for taller sleepers or those who value more space. Best suited to medium or large bedrooms.

Super King Mattress (6ft) – 180 x 200cm / 6’0” x 6’6”

The largest standard mattress in Ireland, the super king 6ft mattress is perfect for master bedrooms. It delivers unmatched space and comfort, ideal for couples or anyone who enjoys maximum room.

Tips for Choosing the Right Mattress Size

Before you buy, consider these practical factors:

• Measure your room – account for doors, windows, and wardrobes.
• Balance furniture scale – ensure your bed complements other items.
• Leave movement space – allow easy access around the bed.
• When in doubt, size up – especially for couples.
• Consider lifestyle and habits – restless sleepers or those who read/work in bed benefit from more space.
• Future-proof your choice – buy with future home or family needs in mind.
• Test with your partner – comfort must suit both sleepers.
• Check delivery/assembly - confirm your mattress can fit through doorways and stairs.
  

Choosing the Right Mattress with Des Kelly Interiors

With over 50 years of experience, Des Kelly Interiors understands the nuances of Irish mattress sizes. Whether you need a compact Single or a luxurious Super King, our expert team can help you choose the perfect fit for your home.

Contact us  today to find out how we can help you find your perfect mattress. Better yet, come in store and speak with one of our experienced sleep experts. They’ll give you free, personalised advice, let you test different options, and guide you towards the mattress that best matches your comfort, lifestyle, and space. Visiting in person ensures you feel the difference before you buy — so you can rest easy knowing you’ve made the right choice.

FAQs About Mattress Sizes in Ireland

Here are some of the most common questions people have about mattress sizes in Ireland, with answers to help make your decision easier.

What is the most common mattress size in Ireland?

The most popular mattress size in Ireland is the Double, measuring 135 x 190cm. It strikes a great balance between comfort and space, making it ideal for solo sleepers or couples with limited room.

Are Irish mattress sizes the same as UK sizes?

Yes, mattress sizes in Ireland are generally the same as those in the UK. For example, a standard Double mattress in both countries measures 135 x 190cm. However, it’s always a good idea to check the specific dimensions provided by each retailer.

What size mattress is best for couples?

For couples, a King (150 x 200cm) or Super King (180 x 200cm) mattress is typically the best choice. These larger sizes offer more personal space, helping ensure a better night’s sleep for both partners.

Do mattress sizes vary across Europe?

European mattress sizes differ from Irish and UK standards. For instance, a European Double mattress usually measures 140 x 200cm, compared to the Irish/UK Double at 135 x 190cm. These differences can affect how well the mattress fits your bed frame and bedding.

What is the biggest mattress size available in Ireland?

The largest standard mattress size widely available in Ireland is the Super King, which measures 180 x 200cm. It offers luxurious space and is ideal for couples or those who simply want extra room to stretch out.