Choosing the right mattress is one of the most important decisions you can make for better sleep, comfort and support. A good mattress should suit your body, your sleeping position, your preferred firmness and the size of your bedroom.
At Emerald Rest, we offer a range of mattresses for homes across Ireland, including supportive coil mattresses, orthopaedic mattresses, pocket sprung mattresses and pillow top options. Whether you are replacing an old mattress or buying a complete divan bed and mattress set, this guide will help you choose the right option.
In this mattress buying guide, we explain mattress sizes, firmness levels, mattress types, support, comfort, sciatica considerations, replacement signs and how to choose a mattress that suits the way you sleep.
What Mattress Size Do You Need?
The first step is choosing the right mattress size. Your mattress should fit your bed base properly and leave enough space in the room for movement, wardrobes, drawers and bedside furniture.
Most mattresses in Ireland and the UK follow standard sizing. The most popular options are Single, Small Double, Double, King size and Super King size.
| Mattress Size | Dimensions | Best For |
|---|---|---|
| Single Mattress | 3ft x 6ft3 / 90cm x 190cm | Children, teenagers, guest rooms and smaller bedrooms |
| Small Double Mattress | 4ft x 6ft3 / 120cm x 190cm | Single adults, compact bedrooms and spare rooms |
| Double Mattress | 4ft6 x 6ft3 / 135cm x 190cm | Couples, main bedrooms and everyday comfort |
| King Size Mattress | 5ft x 6ft6 / 150cm x 200cm | Couples wanting extra width and length |
| Super King Size Mattress | 6ft x 6ft6 / 180cm x 200cm | Larger bedrooms and maximum sleeping space |
If you are replacing only the mattress, check the size of your current divan base or bed frame before ordering. A Double mattress needs a Double base, and a King size mattress needs a King size base.
For a more detailed breakdown, read our full Mattress Size Guide.
What Mattress Firmness Is Best?
Mattress firmness describes how soft or firm the mattress feels when you lie on it. The right firmness depends on your sleeping position, body type and personal comfort preference.
There is no single firmness level that suits everyone. Some people prefer a softer feel with more cushioning, while others need a firmer, more supportive surface.
| Firmness Level | Feel | Often Suitable For |
|---|---|---|
| Soft | Cushioned and pressure-relieving | Side sleepers and lighter sleepers who prefer a softer feel |
| Medium | Balanced comfort and support | Combination sleepers and guest bedrooms |
| Medium-Firm | Supportive with some cushioning | Back sleepers, couples and everyday use |
| Firm | Solid, supportive and less cushioned | Front sleepers, heavier sleepers and those who prefer firmer support |
If you are unsure, a medium or medium-firm mattress is often a safe all-round choice because it offers a balance of comfort and support.
Best Mattress for Side Sleepers
Side sleepers usually need a mattress that cushions the shoulders and hips while still supporting the waist and spine. If a mattress is too firm, it can create pressure around the shoulder and hip. If it is too soft, the body may sink too far into the mattress.
A medium or medium-soft mattress can work well for many side sleepers. Pillow top mattresses may also be a good choice because they add an extra comfort layer while still keeping the support of the mattress beneath.
If you sleep on your side and want a softer, more cushioned feel, browse our mattress collection and compare the available comfort options.
Best Mattress for Back Sleepers
Back sleepers usually need a mattress that keeps the spine supported in a natural position. A mattress that is too soft may allow the hips to sink too much, while a mattress that is too firm may feel uncomfortable across the lower back.
A medium-firm mattress is often a good option for back sleepers because it provides support without feeling overly hard. Orthopaedic mattresses can also be a good choice for customers who prefer a firmer, more supportive feel.
For a complete bedroom setup, you can pair your mattress with one of our divan bed sets, giving you the base, mattress and upholstered headboard together.
Best Mattress for Front Sleepers
Front sleepers usually need a firmer mattress to stop the body sinking too far into the bed. If the mattress is too soft, the hips and stomach can dip, which may make the sleeping position feel less supported.
A firm or medium-firm mattress is usually the better choice for front sleepers. A supportive mattress can help create a more stable sleeping surface and reduce the feeling of dipping into the bed.
If you prefer a firmer feel, consider an orthopaedic or supportive spring mattress from our mattress range.
Best Mattress for Couples
Couples often need a mattress that balances comfort, support and space. A Double mattress is the standard choice for many couples, but a King size mattress can make a big difference if you want more room to move during the night.
Motion transfer is also worth considering. A mattress with individual spring support, such as a pocket sprung mattress, can help reduce movement travelling across the bed compared with some traditional open coil designs.
If space allows, upgrading from a Double mattress to a King size mattress can create a more comfortable sleep setup for two people.
Different Types of Mattresses
Understanding the main mattress types can make it easier to choose the right one. Each mattress construction offers a different feel, level of support and price point.
At Emerald Rest, our mattresses are selected to suit a range of homes, bedrooms and budgets across Ireland.
Open Coil Mattresses
An open coil mattress uses a connected spring system to provide support across the mattress. This type of mattress is often affordable, practical and suitable for children’s rooms, guest rooms and everyday use.
Open coil mattresses can be a good choice if you want a reliable mattress at a lower price point. They are also commonly used in budget-friendly bed and mattress sets.
Our Aspire Coil Mattress is an example of a practical mattress option for customers looking for simple comfort and support.
Orthopaedic Mattresses
An orthopaedic mattress is designed to offer a firmer, more supportive sleeping surface. These mattresses are popular with customers who prefer a solid feel or want extra support from their mattress.
Orthopaedic mattresses are often chosen by back sleepers, front sleepers and those who do not like a mattress that feels too soft. The firmer surface helps create a stable base for sleeping.
Our Contour Ortho Mattress is a strong option for customers looking for a firmer mattress with a supportive feel.
Pocket Sprung Mattresses
A pocket sprung mattress uses individual springs, each working separately to respond to body movement and weight. This can provide more tailored support compared with a basic connected spring system.
Pocket sprung mattresses are popular because they offer comfort, support and reduced movement across the mattress. This can be useful for couples, as one person’s movement is less likely to disturb the other.
Our Summit 1000 Mattress is a pocket sprung option designed for customers who want a more responsive and supportive feel.
Pillow Top Mattresses
A pillow top mattress has an extra comfort layer stitched onto the top of the mattress. This gives the mattress a softer, more cushioned surface while still providing support from the layers underneath.
Pillow top mattresses are popular with customers who want a more luxurious, hotel-style feel. They can be especially comfortable for side sleepers or anyone who likes a cushioned sleep surface.
Our Harmony Pillow Top 2000 Mattress is designed for customers who want added comfort, support and a more premium sleeping feel.
What Is the Best Mattress for Back Support?
The best mattress for back support is one that keeps your body properly supported without feeling uncomfortable. For many people, this means choosing a mattress that is not too soft and not too hard.
A mattress that is too soft may allow the hips to sink too far. A mattress that is too firm may create pressure points and feel uncomfortable over time. A medium-firm or firm mattress is often preferred by customers looking for stronger support.
If back support is your main priority, consider a supportive orthopaedic mattress or a pocket sprung mattress that responds to your body shape and weight.
What Mattress Is Best for Sciatica?
Sciatica is a common issue where pain can travel from the lower back through the hip, leg or foot. While a mattress cannot treat or cure sciatica, the right level of comfort and support can make a big difference to how supported you feel when lying down.
For many people with sciatica or lower back discomfort, a mattress that keeps the spine in a more natural position is usually preferable. A mattress that is too soft may allow the hips to sink too deeply, while a mattress that is too firm may create pressure around the lower back, hips or shoulders.
A medium-firm or supportive mattress is often a good place to start because it can offer a balance of cushioning and stability. Pocket sprung mattresses and orthopaedic mattresses are both popular choices for customers who want stronger support, depending on the level of firmness and comfort they prefer.
Your sleeping position matters too. Side sleepers may need enough cushioning around the hips and shoulders, while back sleepers often benefit from a more even, supportive surface. If sciatica symptoms are severe, ongoing or affecting daily life, it is always best to speak with a medical professional for personal advice.
If you are looking for a more supportive mattress, browse our mattress collection or compare complete divan bed and mattress sets if your current bed base is also old or no longer supportive.
Should You Choose a Mattress Only or a Bed and Mattress Set?
If your existing bed base is still supportive and in good condition, buying a mattress only can be the most practical option. This allows you to improve comfort without replacing the full bed.
If your current base is old, damaged, noisy or no longer supportive, a complete bed and mattress set may be better value. A divan bed set gives you the base, mattress and upholstered headboard together, helping you create a finished bedroom look.
Buying the mattress and base together also helps ensure the mattress is properly supported.
Can a Bad Bed Base Affect Your Mattress?
Yes. Even a good mattress may not feel right if it is placed on an old, damaged or unsuitable bed base. A worn base can reduce support, create dips and affect how the mattress performs.
If your current bed base creaks, sags or feels uneven, it may be time to replace it. You can choose a new divan base, upgrade to a complete divan bed set, or choose one of our upholstered beds.
For bedrooms where storage is important, an ottoman bed can also be a practical option.
How Often Should You Replace Your Mattress?
Most mattresses do not last forever. Over time, a mattress can lose comfort, support and shape. How long a mattress lasts depends on the quality, construction, use and how well it is cared for.
As a general guide, many customers consider replacing their mattress every 7 to 10 years. However, some mattresses may need replaced sooner if they are sagging, lumpy, uncomfortable or no longer supportive.
Signs you may need a new mattress include:
- You wake up feeling stiff, sore or uncomfortable
- The mattress has visible dips, lumps or sagging
- You roll towards the middle of the bed
- The mattress feels less supportive than it used to
- You sleep better on another bed, such as in a hotel or guest room
- The mattress is noisy, worn or difficult to get comfortable on
If your mattress no longer helps you sleep comfortably, it may be time to browse our mattresses and compare new options.
How to Make Your Mattress Last Longer
Looking after your mattress can help it stay comfortable and supportive for longer. Simple care steps can also help keep your sleep surface fresher.
- Use a mattress protector to help guard against spills and marks
- Rotate the mattress if the care instructions recommend it
- Make sure the mattress is placed on a suitable bed base
- Keep the bedroom ventilated where possible
- Avoid bending or folding the mattress unless the manufacturer says it is suitable
- Check the product care instructions for your specific mattress
Good mattress care can help protect your investment and keep your bedroom feeling fresher.
Which Mattress Is Best for a Guest Room?
For a guest room, it is usually best to choose a mattress with a balanced comfort level. A medium or medium-firm mattress can suit a wider range of guests than a very soft or very firm mattress.
A Double mattress is a popular choice for guest bedrooms if the room has enough space. For smaller rooms, a Single or Small Double mattress may be more practical.
If you are furnishing the whole guest room, a complete divan bed set can be a simple and cost-effective option because it includes the base, mattress and headboard together.
Which Mattress Is Best for a Main Bedroom?
For a main bedroom, comfort and support should be the priority. This is the mattress you will use most often, so it is worth choosing an option that suits your sleeping position, room size and preferred firmness.
Couples may prefer a King size mattress or Super King size mattress for extra room. If you want a more premium feel, a pocket sprung or pillow top mattress may be worth considering.
You can also create a complete bedroom look with a divan bed set, upholstered bed frame or ottoman bed.
Mattress Buying Checklist
Before choosing your new mattress, use this simple checklist:
- Choose the right size: Single, Small Double, Double, King size or Super King size.
- Think about firmness: soft, medium, medium-firm or firm.
- Consider your sleeping position: side, back, front or combination sleeper.
- Check your bed base: make sure it is supportive and the correct size.
- Think about your room: leave enough space around the bed.
- Compare mattress types: open coil, orthopaedic, pocket sprung or pillow top.
- Set your budget: decide whether you need a mattress only or a complete bed set.
Why Choose a Mattress From Emerald Rest?
Emerald Rest supplies beds and mattresses across Ireland, with a focus on practical comfort, strong value and simple buying options. Whether you need a mattress only or a complete bed and mattress set, our range is designed to make it easier to choose the right setup for your home.
Our mattress range includes options for children’s rooms, guest bedrooms, main bedrooms, couples and customers looking for firmer support. You can also pair your mattress with a divan base, divan bed set, ottoman bed or upholstered bed frame.
We also offer free 2-man delivery across Ireland, helping make your new mattress delivery straightforward from order to bedroom.
Frequently Asked Questions About Mattresses
What is the best mattress firmness?
The best mattress firmness depends on your sleeping position, body type and comfort preference. Medium and medium-firm mattresses are popular all-round choices, while firmer mattresses may suit front sleepers or customers who prefer stronger support.
What mattress is best for back support?
A supportive medium-firm or firm mattress is often preferred by customers looking for better back support. Orthopaedic and pocket sprung mattresses can both be good options depending on the level of comfort and support you prefer.
What mattress is best for sciatica?
There is no single mattress that suits everyone with sciatica, but many people prefer a medium-firm or supportive mattress that helps keep the body well aligned. A mattress that is too soft may allow the hips to sink too far, while a mattress that is too firm may create pressure points. If you have severe or ongoing sciatica, speak with a medical professional for advice.
What mattress size is best for couples?
A Double mattress is the standard choice for many couples, but a King size mattress gives extra width and length. If your room has the space, a King size or Super King size mattress can offer a more comfortable sleep setup.
Is a pocket sprung mattress better?
A pocket sprung mattress can offer more responsive support because the springs work individually. This can be useful for couples and for customers who want a more supportive mattress feel.
Is an orthopaedic mattress very firm?
Orthopaedic mattresses are usually designed to feel firmer and more supportive. They can be a good option if you prefer a solid sleeping surface or want extra support from your mattress.
How do I know when I need a new mattress?
You may need a new mattress if your current one is sagging, lumpy, uncomfortable, noisy or no longer supportive. Waking up stiff or sleeping better in another bed can also be signs that your mattress needs replaced.
Final Thoughts
The right mattress should feel comfortable, support your body properly and suit the way you sleep. Start by choosing the correct size, then think about firmness, mattress type, sleeping position and whether your current bed base is still suitable.
If you only need to improve comfort, browse our full range of Mattresses. If you are replacing the whole bed, explore our Divan Bed Sets, Ottoman Beds, Divan Bases and Upholstered Beds.