Best Mattress for Kids in Australia: What Should Parents Look For?

The best mattress for kids in Australia should provide appropriate support, fit the child’s bed frame, suit their size and sleeping preferences, and be durable enough for everyday use. For most school-aged children, a well-made Single or King Single mattress is a practical starting point, but the right choice depends on the child’s age, height, bedroom space and how long the mattress needs to last.

Why Choosing the Right Kids’ Mattress Matters

Children use their beds every day, so choosing a suitable mattress is about more than comfort. Parents need to consider whether the mattress fits properly, supports the child as they grow, is easy to maintain and offers good value over its expected lifespan.

A mattress that is too short may need replacing sooner than expected, while an unnecessarily large mattress can take up valuable bedroom space. Materials, construction and firmness also influence how a mattress feels and performs over time.

Safety deserves particular attention for babies and toddlers. Infant mattresses have specific firmness, fit and safety requirements that do not automatically apply to mattresses designed for older children. Parents should always choose a mattress appropriate for the child’s age and sleep environment rather than assuming one mattress suits every stage of childhood.

1. Choose the Right Kids’ Mattress Size

Mattress size is one of the first decisions to make when buying a children’s mattress. The best size depends on the child’s current height, how quickly they are growing, the dimensions of the bed frame and the available bedroom space.

In Australia, Single and King Single are two common options for children. Double mattresses may also suit older children or teenagers who want more sleeping space.

Australian Kids’ Mattress Size Guide

The following dimensions are approximate examples. Exact measurements can vary slightly by manufacturer, so check the product specifications before purchasing.

Mattress size	Approximate dimensions (W × L)	Best suited to
Single	92 × 188 cm	Younger children, smaller bedrooms and compact spaces
Long Single	92 × 203 cm	Taller children who need extra length without extra width
King Single	107 × 203 cm	Growing children, taller children and teenagers
Double	138 × 188 cm	Older children or teenagers who prefer more width

 

Australian mattress sizing references commonly list Single mattresses at around 91.5 × 190 cm and King Single mattresses at around 105.5 × 203 cm, illustrating why checking the exact brand dimensions matters. 

Single Mattress for Kids: When Is It Enough?

A Single mattress is a practical option for many children because it fits comfortably into smaller bedrooms and works with a wide range of bed frames and bedding.

It can be a sensible choice when:

• The bedroom has limited floor space.
• The child is still relatively short.
• You want to keep the initial cost of a new bed manageable.
• The bed is intended for a guest room or occasional use.

However, consider the mattress length before buying. A standard Single may not provide enough growing room for a taller child over the next several years.

King Single Mattress for Kids: Is the Extra Space Worth It?

A King Single mattress is longer and wider than a standard Single, making it a useful option for growing children and teenagers.

Its additional length can help reduce the chance of outgrowing the mattress too quickly. The extra width also gives children more room to change sleeping positions.

A King Single may be worth considering if you have enough bedroom space, expect your child to grow considerably, or want a bed that can remain useful into their teenage years.

Practical tip: Measure both the mattress and the external dimensions of the bed frame. The frame may take up more floor space than the mattress itself.

2. What Is the Best Mattress Firmness for Kids?

The best mattress firmness for kids depends on their age, the type of mattress and their individual comfort needs. For older children sleeping on a standard bed, the goal is to find a surface that feels comfortable and provides consistent support without being excessively soft or uncomfortably hard.

Firmness and support are related, but they are not the same thing. Firmness describes how hard or soft the mattress feels, while support describes how well it accommodates the sleeper without excessive sinking or uneven positioning.

Should You Choose a Firm or Medium Mattress?

A very soft mattress is not automatically more comfortable, and a very firm mattress is not automatically more supportive.

For school-aged children, consider the following when comparing mattress firmness:

• Comfort: Does the mattress feel comfortable in the child’s usual sleeping positions?
• Support: Does the mattress maintain a reasonably even sleeping surface without excessive sagging?
• Movement: Can the child change positions comfortably?
• Construction: Does the mattress retain its shape under regular use?

Where possible, check the manufacturer’s age guidance and test the mattress using the retailer’s recommended process.

Important safety distinction: Babies under 12 months require a firm, flat, level and correctly fitting sleep surface that meets the applicable infant sleep safety requirements. Adult mattress firmness labels such as “medium” or “plush” should not be used as a substitute for infant mattress safety guidance. 

3. Compare Mattress Materials: Foam vs Hybrid

The material and internal construction of a kids’ mattress influence its feel, weight, maintenance and expected durability. There is no single mattress type that is best for every child, so compare the construction rather than relying on marketing labels alone.

Memory Foam Mattress for Kids

Memory foam responds to pressure and can create a more contouring feel than some other mattress materials.

Potential advantages include:

• A close, cushioning feel.
• Limited transfer of movement across the mattress, depending on construction.
• No metal springs within an all-foam design.
• A range of available firmness levels and thicknesses.

Things to consider include the mattress’s weight, how easily it can be moved, and whether the foam retains heat for your child. Cooling performance varies by formulation, cover and overall construction, so a “cooling” label alone is not a guarantee of a cooler sleep experience.

A memory foam mattress for kids may suit families who prefer a cushioning surface, provided the specific mattress is appropriate for the child’s age and intended use.

Hybrid Mattress for Kids

A hybrid mattress typically combines a spring support system with foam or other comfort layers.

Depending on its construction, a hybrid mattress may offer:

• A more responsive feel when changing positions.
• A combination of cushioning and spring support.
• Different levels of airflow through the spring system.
• A range of comfort options.

Hybrid mattresses can be heavier than some all-foam alternatives, which may matter when moving a bed or changing rooms.

Which Kids’ Mattress Type Should You Choose?

Consideration	Memory foam	Hybrid
General feel	Often more contouring	Often more responsive
Internal structure	Foam layers	Springs plus comfort layers
Movement isolation	Depends on foam density and construction	Depends on spring and comfort-layer design
Moving and handling	Varies by size and density	May be heavier
Best approach	Compare the feel and specifications	Compare the feel and specifications

 

Neither type is automatically superior. The best mattress for kids is the one that meets the child’s needs, fits the bed frame and offers suitable construction for everyday use.

4. How Thick Should a Kids’ Mattress Be?

Kids’ mattress thickness varies by product and intended use. Thickness alone does not determine comfort, support or quality. The materials, internal structure and compatibility with the bed frame matter just as much.

When comparing kids’ mattress thickness, consider three practical factors.

First, check the bed frame. Some frames, trundle beds and bunk beds have specific mattress-height limits. A mattress that is too thick may not fit the intended setup safely.

Second, consider the total bed height. A thicker mattress can raise the sleeping surface, which may affect how easily a child gets into and out of bed.

Third, check the bedding. Fitted sheets must accommodate the mattress depth. A mattress that is deeper than expected may require sheets with a larger pocket depth.

What About Bunk Beds?

Bunk beds require particular care. Always follow the bed manufacturer’s mattress-thickness and safety instructions, including any maximum mattress height and guardrail requirements. Do not assume that a mattress suitable for a standard Single bed is automatically suitable for the same size bunk bed.

For younger children, use a sleep setup appropriate for their developmental stage and follow the manufacturer’s age recommendations for the bed.

5. Consider Your Child’s Sleeping Position and Comfort

Children may change sleeping positions throughout the night, so it is often more useful to focus on overall comfort and support than to select a mattress based on one sleeping position alone.

For older children, the following considerations can help narrow the options.

Side Sleepers

Children who usually sleep on their sides may prefer a mattress that provides some cushioning around the shoulders and hips while maintaining a supportive surface.

A mattress that feels excessively hard may be uncomfortable for some side sleepers, but adding more cushioning is not always the answer. The overall construction and the child’s comfort should guide the decision.

Back Sleepers

Back sleepers may prefer a mattress that feels balanced rather than excessively soft or rigid. Look for a sleeping surface that remains consistent and does not sag noticeably under normal use.

Combination Sleepers

Children who move between their sides, backs and stomachs may prefer a mattress that makes changing positions comfortable. Mattress responsiveness can be relevant here, but the child’s overall comfort remains the most useful guide.

These are general comfort considerations, not medical recommendations. If your child has persistent pain, mobility difficulties or another specific health concern, seek advice from an appropriate healthcare professional rather than relying on mattress selection alone.

6. Think About Durability and Everyday Maintenance

A kids’ mattress can experience more than ordinary overnight use. Spills, food crumbs, occasional accidents and frequent movement can all affect how easy it is to keep the bed clean.

When comparing a mattress for kids, look at the cover material, care instructions, construction quality and available warranty terms.

Is a Mattress Protector Necessary for Kids?

A mattress protector can help reduce the amount of liquid, sweat and everyday dirt that reaches the mattress. It can also make routine bed maintenance easier.

When choosing a kids’ mattress protector, consider:

• Whether it provides the level of liquid protection your family needs.
• Whether it fits the mattress depth securely.
• Whether it can be removed and washed according to the care instructions.
• Whether its material and construction suit your child’s comfort preferences.

A waterproof protector may be useful for children who are toilet training or prone to nighttime accidents. Choose one that fits correctly and follow the mattress and protector manufacturers’ cleaning guidance.

For infants, ensure that all bedding and accessories are consistent with current safe-sleep guidance. A protector must not compromise the required sleep surface or introduce loose, unsafe bedding.

How Long Should a Kids’ Mattress Last?

There is no single replacement age that applies to every children’s mattress. Lifespan depends on construction, frequency of use, care and the child’s changing size and needs.

Consider replacing a mattress when you notice:

• Visible sagging or permanent indentations.
• Damaged seams, covers or internal components.
• A surface that no longer feels even or supportive.
• A mattress that has become too short for the child.
• Persistent hygiene issues that cannot be resolved through appropriate cleaning.

Follow the manufacturer’s care and warranty instructions, and do not rely on age alone to determine whether a mattress remains suitable.

7. How to Choose a Kids’ Mattress That Offers Good Value

The cheapest mattress is not always the best value, but the most expensive option is not necessarily the best choice either.

To compare value, consider the total cost of the sleeping setup and how long it is likely to remain suitable.

For example, a King Single mattress may cost more initially than a Single, but its additional length could make it a more practical option for a taller child. Conversely, buying a larger mattress may not be worthwhile if the room is small or the bed frame will need replacing.

Before purchasing, compare:

• Mattress size: Does it suit the child now and provide enough room for expected growth?
• Construction: Are the materials and support system clearly described?
• Comfort: Can you assess the mattress through an in-store test or trial policy?
• Maintenance: Are the cover and cleaning requirements practical?
• Warranty: What is covered, for how long, and under what conditions?
• Delivery: Can the mattress be delivered into the bedroom, including through stairs, hallways and doorways?
• Returns: Are there trial periods, collection fees or other conditions?

A longer warranty does not automatically mean a mattress will last longer, and a sleep trial does not necessarily mean a product can be returned without conditions. Read the terms before buying.

8. A Practical Kids’ Mattress Buying Checklist

Use this checklist to compare options before choosing a mattress.

• Measure the bed frame and confirm the required mattress dimensions.
• Consider the child’s current height and likely growth.
• Choose a mattress intended for the child’s age group.
• Compare firmness, materials and construction.
• Check thickness limits if the mattress is for a bunk or trundle bed.
• Review care instructions and consider a suitable mattress protector.
• Check delivery access, warranty conditions and return policies.
• Confirm that the fitted sheets and other bedding match the mattress size.

Working through these points helps narrow the options without assuming that one mattress type or size will suit every family.

Frequently Asked Questions

What is the best mattress for kids in Australia?

The best mattress depends on the child’s age, height, comfort preferences and bed setup. A Single is a practical option for many children, while a King Single offers additional length and width for growing children and teenagers.

Is a Single or King Single mattress better for kids?

A Single generally takes up less space and may cost less. A King Single provides extra room and can be more practical for taller children or those who will use the bed into their teenage years. Measure the bedroom and bed frame before deciding.

Are memory foam mattresses good for kids?

A memory foam mattress may suit older children who prefer a contouring feel. Compare the mattress’s construction, heat retention, weight and age suitability rather than assuming all memory foam mattresses perform the same way.

How often should you replace a kids’ mattress?

Replace a mattress when it becomes damaged, develops noticeable sagging, is no longer hygienic or no longer fits the child properly. The appropriate replacement time varies with construction, care and use.

Do kids need a mattress protector?

A mattress protector can help protect against spills, sweat and everyday dirt, making maintenance easier. Choose one that fits securely and is compatible with the mattress and the child’s sleep setup.

Can a baby use a regular kids’ mattress?

A baby should sleep on a mattress specifically designed for the cot or infant sleep product and compliant with the applicable safety requirements. It must be firm, flat, level, clean and fit correctly. A standard mattress designed for older children is not automatically suitable for an infant.

Final Thoughts: 

The best mattress for kids in Australia is not necessarily the thickest, firmest or most expensive option. It is a mattress that suits the child’s age and size, fits the bed frame correctly, provides a comfortable and supportive surface, and is practical to maintain.

Start by choosing the right size, then compare mattress construction, firmness, thickness, durability and warranty conditions. For many families, a Single or King Single will be the most practical starting point. For babies, always prioritise an age-appropriate sleep surface that meets current safety requirements.

A careful comparison helps parents choose a mattress that meets their child’s needs today while making sensible use of their budget and bedroom space.