Boori kids mattresses are available in standard Australian sizes: single (92x188cm), king single (107x203cm), double (136x188cm), trundle (88x180cm), and bedside bed (79x159cm), with pocket spring, foam, and airflow options. All mattresses are medium-firm by design, supporting healthy spinal development for growing children, and are sized to fit Boori bed frames precisely.
What Is the Best Kids Mattress for Australian Children?
The best kids mattress is medium-firm, sized to fit the bed frame exactly, and has a breathable cover suited to Australian conditions.
A good night's sleep starts with a comfortable kids' mattress. Boori offers a diverse range of mattresses tailored to children, designed with your child's comfort and healthy development in mind. Each mattress has a medium-firm surface, optimal for growing children as it supports spinal alignment during sleep.
Pocket spring technology helps distribute weight evenly and respond to pressure across the mattress surface. Foam options can also suit younger children or lighter beds, but families in warmer or humid homes may prefer pocket spring or airflow construction because it allows more breathability. The collection includes mattresses suitable for Boori children's kids beds, including single, king single, double, trundle and bedside bed frames.
For bunk bed top bunks, the mattress choice must also consider safety height. A mattress that is too thick can reduce guardrail effectiveness, so the top bunk mattress must not exceed 20cm thick per AS/NZS 4956.
Why Choosing the Right Kids Mattress Matters?
The right mattress matters because children spend 10-12 hours per day sleeping during their primary school years, and poor support during this time can affect posture and sleep quality.
A mattress for children is very important for physical growth. As kids get older, their bodies require the correct support to help them sleep well and peacefully.
Children need a medium-firm mattress, not a very soft one, to maintain spinal alignment during growth. A mattress that is too soft can allow the hips or shoulders to sink too far, while a mattress that is too hard may feel uncomfortable and interrupt sleep. The goal is firm support with enough comfort for the child's preferred sleeping position.
- Healthy Spine Development: A supportive mattress helps keep the spine aligned as the child grows. This is especially important during primary school years, when the body is developing quickly.
- Better Sleep: Good support helps a child sleep more comfortably through the night, which can support mood, focus and energy the next day.
- Durability: A mattress needs to keep its support for years of nightly use. Pairing the right mattress with a quality bed frame from the Boori Kids Collection helps maintain comfort as the child grows.
For more detail on size, support and materials, read the Boori guide on how to choose the perfect mattress for your child.
Types of Kids Mattresses
Standard Australian kids mattress sizes are listed below so parents can match the mattress to the bed frame before ordering.
| Mattress Size | Dimensions | Best Use |
|---|---|---|
| Single | 92cm x 188cm | Most common kids mattress size; usually suits ages 4-10. |
| King Single | 107cm x 203cm | Suits ages 8+ and taller children needing more length. |
| Double | 136cm x 188cm | Suits teens, older children, or rooms where a guest bed is useful. |
| Trundle | 88cm x 180cm | For Boori trundle frames only. |
| Bedside Bed | 79cm x 159cm | For Boori bedside bed frames only. |
| Top Bunk | Same as single | Must not exceed 20cm thick per AS/NZS 4956. |
Kids Single Mattress
A kids single mattress measures 92cm x 188cm in standard Australian sizing and is usually the most practical size for children aged 4-10.
Most children choose the single mattress as their first long-term bed size after leaving a cot or toddler bed. It fits comfortably into smaller rooms and works well in apartments, townhouses and shared bedrooms. A single mattress can be made from several materials, such as foam or pocket springs. Each material offers a different level of comfort and support, but a medium-firm feel is the safest starting point for most children who need stable support as they sleep.
Kids Double Mattress
A kids double mattress measures 136cm x 188cm and gives older children or teens more width without changing to an adult queen-size frame.
A double mattress can be useful in medium to large rooms, especially when parents want the bed to double as a guest bed or a reading space. This mattress size gives children more room to stretch as they grow, while still offering the same medium-firm support expected from a children's mattress. It is best suited to older children, teens or larger bedrooms where the bed will not crowd storage, study furniture or walking space.
Kids King Single Mattress
A kids king single mattress measures 107cm x 203cm and suits taller children or children aged around 8+ who need extra length.
The king single mattress is longer and wider than a standard single, so it can last through upper primary and secondary school. It is often a practical middle step for families that want more space than a single without the wider footprint of a double. This size can also work well in a 3m x 3m Australian bedroom where a double bed would make the room feel too tight.
Kids Mattress with Pocket Springs
A kids mattress with pocket springs uses individually wrapped springs that respond to pressure independently, improving support and breathability.
Pocket spring mattresses can help distribute weight evenly and reduce motion transfer, which is useful for children who move around during sleep. This style is often a good choice for older children, warmer sleepers, or families in humid Australian states where airflow matters. The support can feel more responsive than basic foam, while the breathable structure helps reduce heat build-up overnight.
Trundle and Bedside Bed Mattresses
Boori-specific mattress sizes are needed for some frames, including trundle and bedside bed designs.
A Boori trundle mattress measures 88cm x 180cm and is designed for trundle frames rather than standard single beds. A bedside bed mattress measures 79cm x 159cm and must be matched to the correct frame. If you are buying a replacement mattress for a non-standard frame, check the product page rather than assuming a standard single mattress will fit. The Natty Bedside Bed & Pocket Spring Mattress Package is one example where the frame and mattress are matched together.
Choosing the Right Kids Mattress for Your Child's Needs
Choose a kids mattress based on the bed frame size, the child's age and weight, and whether they sleep hot. Foam retains heat more than pocket spring, while pocket spring and airflow construction usually feel cooler.
- For Toddlers: A firm, supportive mattress is very important. A single mattress made with hypoallergenic materials can keep younger children comfortable while reducing exposure to common allergens.
- For School-Aged Children: A single or king single kids mattress is usually practical. A medium-firm mattress with pocket springs or foam gives growing children the support they need.
- For Teenagers: Teenagers may want more space, but they still need stable support. A kids double mattress or king single mattress can give older children more room to move while still supporting spinal alignment.
In humid Australian states such as Queensland and coastal New South Wales, a pocket spring mattress with a breathable quilted cover is preferable to foam-only options, which can retain heat and moisture. For cooler homes in Melbourne, Canberra or highland areas, medium-firm foam or hybrid options can still work well if the room has good ventilation and the child is not a hot sleeper.
Weight also matters. Younger children under 8 often do not need the same deep postural response as older children, so a lighter foam mattress may be practical. Older children, taller children and teens usually benefit from better airflow and more responsive support, which is why pocket spring construction becomes more useful as they grow.
Is My Child's Mattress Safe? What to Check
A safe kids mattress fits snugly within the bed frame with no gaps at the sides, uses non-toxic materials and low-VOC covers, and does not exceed 20cm thickness on a bunk bed top bunk per AS/NZS 4956.
- Proper Spine Alignment: A kids mattress that is both firm and comfortable helps support a healthy sleeping posture. This is important for children who are still growing.
- Breathable and Moisture-Wicking Fabrics: These materials allow airflow and help keep the mattress cooler and drier, which can support more comfortable sleep and reduce moisture build-up.
For bunk beds, mattress thickness is a safety issue as well as a comfort decision. A top bunk mattress must not exceed 20cm thick because a thicker mattress reduces the effective guardrail height. Families using bunk beds should also check that the mattress sits flat on the base, does not slide, and leaves no gaps where a child could become trapped.
A mattress protector can improve safety and hygiene by limiting moisture damage, stains and odour build-up. It also helps keep the sleep surface cleaner during toilet-training years, illness, hot weather and everyday spills.
What Should I Look for in a Kids Mattress?
The best kids mattress for Australian conditions uses a breathable cover, medium-firm support, and either pocket spring or airflow construction to manage temperature variation in Australian homes.
When selecting the best kids mattress, the material plays a pivotal role in determining comfort, durability and safety. Different materials offer varying levels of support and breathability, both of which matter for a restful night for your child. The material also influences heat retention, allergen resistance and longevity. Some foam mattresses may retain more heat, while innerspring or hybrid designs may offer better airflow. To support children with allergies, materials that resist dust mites and mould are preferable.
Also check the mattress cover, edge support, weight, rotation instructions and exact thickness. A mattress that is easy to lift and rotate is more practical for parents, especially in top bunks or trundles. A breathable quilted cover can help in warm climates, while a mattress protector is useful in every room because it limits moisture reaching the mattress core.
How Do Foam, Pocket Spring and Airflow Mattresses Compare?
Foam, pocket spring and airflow mattresses can all work for children, but they suit different ages, climates and support needs.
Foam mattresses are generally lighter and easier to move, which can be helpful for younger children, trundle beds or families who need a mattress that can be lifted regularly. They can be cost-effective and comfortable, but dense foam can retain more heat in summer and may not suit children who sleep hot.
Pocket spring mattresses use individually wrapped coils that respond separately to body weight. This gives growing children more adaptive support and usually allows better airflow than dense foam. Pocket spring construction is often the stronger choice for older children, taller children and families in warmer or more humid regions.
Airflow-focused mattresses are designed to help heat and moisture move away from the sleep surface. In Australian homes, especially coastal or tropical areas, this can make the bed feel fresher overnight. The best choice depends on your child's body size, room temperature, bed frame and whether the mattress will sit on a standard bed, trundle or bunk.
How to Match a Mattress to a Boori Bed Frame?
A mattress should match the exact bed frame dimensions, because even a small size mismatch can create gaps, movement or reduced guardrail protection.
For standard single, king single and double frames, use Australian-standard dimensions: 92x188cm for single, 107x203cm for king single and 136x188cm for double. For trundle and bedside bed frames, use the Boori-specific measurements listed in the product details. Replacement shopping should always start with the frame size, not just the child's age.
If the mattress is for a bunk bed, check both size and thickness. A mattress that is technically the right length and width may still be unsuitable for the top bunk if it is too thick. Keep the top bunk limit at 20cm or less under AS/NZS 4956. For extra planning ideas around smaller children's bedrooms, see clever kids storage ideas for small bedrooms, especially where storage beds, trundles and bunk beds share the same room.
Discover Our Selection of Kids Mattresses at Boori
Boori kids mattresses are available in foam, pocket spring, and airflow options in all sizes. Browse by size or bed type to find the right fit.
The Importance of the Right Mattress for Kids
The right mattress supports comfort, posture and sleep consistency, so this section is now covered through the size, safety and support guidance above.
Shopping for Your Kid's Mattress at Boori
Browse Boori kids mattresses online, filtered by size, to find the right match for your bed frame. Free delivery is available on orders over $150 to metro Sydney, Melbourne, Brisbane, and Canberra.
Kids Mattresses in Australia: Shipping and Support
Boori delivers kids mattresses to major Australian metro areas, with free delivery on orders over $150 to Sydney, Melbourne, Brisbane, and Canberra metro postcodes. Check the product page and delivery information before ordering if you live outside metro areas.
What Should I Pair With a Kids Mattress?
A kids mattress works best with correctly fitted bedding, a mattress protector and the right bed frame base.
Choose fitted sheets that match the exact mattress size, especially for king single, trundle and bedside bed mattresses. Standard single bedding will not fit a king single correctly, and oversized bedding can bunch around the mattress. For everyday comfort, pair the mattress with breathable kids bedding that can be layered by season.
A mattress protector is one of the most useful add-ons for a child's room because it protects against spills, sweat, toileting accidents and illness. Moisture is one of the main reasons a mattress can deteriorate early, particularly in humid homes. Browse mattress protectors when setting up a new mattress, and consider reading kids bedroom ideas if you are updating the full room at the same time.
How Should Parents Care for a Kids Mattress?
A kids mattress lasts longer when it is protected from moisture, rotated regularly and kept on the correct bed base.
Use a mattress protector from the first night, especially for younger children, toilet-training years and warm Australian summers. A protector helps reduce sweat, spills, stains and odour reaching the mattress core. It also makes cleaning easier because the protector can be removed and washed, while the mattress itself should only be spot cleaned according to the care instructions.
Rotate the mattress every 3-6 months unless the product instructions say otherwise. Rotation helps reduce uneven wear, especially for children who sleep in the same position every night. Check the slatted base at the same time to make sure the mattress is supported evenly and that no slats are loose or damaged.
Keep the room ventilated where possible. In humid areas such as coastal New South Wales and Queensland, open windows when weather allows or use a fan to improve airflow. Avoid placing the mattress directly on the floor for long periods, as this can trap moisture underneath. If the mattress is used on a trundle, pull it out regularly so it can air properly before being stored again.
For bunk beds, care also includes checking thickness and fit after adding any protector or fitted sheet. The top bunk mattress must still sit below the guardrail safely and remain no thicker than 20cm. This keeps the sleep surface comfortable while preserving the safety protection required by AS/NZS 4956.
Kids Mattresses: FAQ
What size mattress does my child need?
Australian standard single mattresses measure 92x188cm: the right size for most children aged 4-10. A king single (107x203cm) suits older or taller children. For bunk bed top bunks, the mattress must not exceed 20cm thick per AS/NZS 4956. Confirm exact frame dimensions before purchasing a replacement mattress, as trundle and bedside bed frames use non-standard sizes.
What is the difference between a foam and pocket spring kids mattress?
Foam mattresses are lighter, less expensive, and easier to handle, suitable for younger children under 8 who do not yet need the same level of postural support. Pocket spring mattresses use individually wrapped coils that respond independently to weight, offering better support, breathability, and durability. For Australian children in warmer or humid climates, a pocket spring with a breathable quilted cover is generally preferable to foam.
What is the best kids mattress for Australian conditions?
In Australia's warm and sometimes humid climate, the best kids mattress uses pocket spring or airflow construction rather than dense foam, which retains heat. Look for a breathable quilted cover, medium-firm support rated for growing children, and a size that fits the bed frame exactly with no gaps at the sides. In coastal or tropical areas, a moisture-resistant mattress protector is also recommended.
How do I know when to replace my child's mattress?
Replace a kids mattress when it shows visible sagging, when the child regularly wakes with back or neck discomfort, or when they have outgrown the size. Most quality kids mattresses last 8-10 years with regular rotation every 3-6 months and the use of a mattress protector from day one. A mattress protector prevents moisture damage, which is the most common cause of early mattress deterioration in Australian homes.
Can I use any mattress in a Boori kids bed?
Boori mattresses are sized to fit Boori frames exactly. For standard single and king single frames, any Australian-standard mattress of the correct dimension will fit. For Boori-specific frames, including bedside bed 79x159cm and trundle 88x180cm, Boori-specific mattresses are required. For bunk beds, the top bunk mattress must not exceed 20cm thick per AS/NZS 4956, regardless of brand.
