Boori baby cot mattresses are available in pocket spring, foam, and airflow formats, all sized to fit Boori cot frames exactly. Standard cot mattress: 132x70cm. Compact cot mattress: 119x65cm. Oval cot mattress: 119x64cm. Bassinet mattress: 80x41cm. All meet AS/NZS 8811 (the Australian mattress safety standard). A firm, flat mattress with no gaps larger than 25mm is required by AS/NZS 2172:2003.
What Are the Different Cot Mattress Sizes in Australia?
Boori cot mattress sizes are matched to specific frames rather than sold as universal fits.
| Mattress type | Size | Fits |
|---|---|---|
| Standard cot mattress | 132 x 70cm | All Boori standard cots, the most common cot mattress size in Australia |
| Compact cot mattress | 119 x 65cm | All Boori compact cots |
| Oval cot mattress | 119 x 64cm | Boori Eden Oval Cot only, not interchangeable with rectangular mattresses |
| Bassinet mattress | 80 x 41cm | Boori Tidy Bassinet |
| Cradle mattress | 89 x 46cm / 92 x 46cm | Neat Rocking Cradle / Matilda Rocking Cradle |
Always order the mattress specified for the cot model. Do not assume a close size will fit, a gap of more than 25mm between the mattress and the cot frame is a safety risk under AS/NZS 2172:2003. Sizes for bassinets and cradles and for the oval cot are listed on each product page.
The mattress must fit the cot frame with no gap larger than 25mm on any side, this is a requirement of AS/NZS 2172:2003. Red Nose Australia recommends a firm, flat sleep surface with no soft bedding in the cot.
A good cot mattress supports healthy sleep from the first night. The right size, the right firmness, and breathable materials all matter more than any single feature. You can see how the mattress pairs with the rest of the room in our baby collection.
What Types of Baby Cot Mattress Are Available in Australia?
Three formats cover almost every requirement. Pocket spring mattresses are firm with good airflow and a longer lifespan, best for full-size cots. Foam mattresses are lighter and lower cost, suitable for compact cots and lighter use. Airflow mattresses offer maximum breathability, suited to warmer Australian climates such as Queensland and northern New South Wales.
A breathable, supportive cot mattress keeps the sleep surface even and comfortable through the night. Slatted cot bases help air move underneath, and a mattress with good internal airflow works with that rather than against it.
The right choice depends on the cot size, the climate, and how long you expect to use the mattress. For a full-size cot used daily from birth to the toddler transition, the pocket spring option usually earns its extra cost.
What Does a Safe Baby Cot Mattress Need to Have?
The mattress must meet AS/NZS 8811, the Australian standard for cot mattresses, and AS/NZS 2172:2003 requires the mattress to fit with no gap larger than 25mm. Red Nose Australia states the mattress must be firm enough that it does not mould to the shape of the baby's head when pressed.
Fit comes first, firmness second, materials third. A mattress that sits flush against the cot rails on all four sides is the baseline requirement, and everything else follows from there.
Press the surface with a flat palm when the mattress arrives. It should spring back immediately and feel consistent from end to end. A mattress that holds an impression is too soft for infant sleep, regardless of what the label says. Our cot mattress buying guide covers how to run that check properly.
Why Does Airflow Matter in an Australian Baby Cot Mattress?
In warmer parts of Australia (QLD, northern NSW, WA), an airflow or pocket spring mattress reduces overheating risk. The ideal nursery temperature recommended by Red Nose Australia is 16–20°C, breathable mattresses and light bedding help achieve this without air conditioning running overnight.
Air movement through the mattress core helps regulate temperature across the whole surface, not just at the edges. This matters most through humid nights when a sealed foam core holds heat against the baby.
Pair a breathable mattress with light, breathable bedding and the sleep surface stays comfortable without extra intervention.
How Do I Care for a Baby Cot Mattress?
Use a mattress protector from the first night, rotate the mattress every two to three months, and air the room daily.
A washable protector guards against spills and extends the useful life of the mattress. Vacuum the surface occasionally to lift dust, and let the mattress air before remaking the cot after a spill.
Rotating the mattress end to end distributes wear evenly so the surface stays level. In humid seasons, good ventilation around the cot helps the core stay dry.
How Are Boori Cot Mattresses Designed for Australian Conditions?
All Boori cot mattresses are sized to fit Boori cot frames exactly, eliminating the risk of dangerous gaps at the sides. Each mattress page includes the exact internal cot dimensions so parents can cross-check before ordering against the cot range.
Australian homes vary widely in climate, and the mattress range reflects that. A family in Melbourne and a family in Cairns are solving different problems with the same piece of furniture.
Buying the mattress at the same time as the cot removes the sizing question entirely, and it means both arrive together for a single setup.
What Should I Know About Travel Cot Mattresses in Australia?
A travel cot uses a separate compact mattress, not a standard cot mattress. Boori compact cot mattresses (119x65cm) are not travel cot mattresses; they are for permanent use in compact Boori cots. Always check the travel cot's stated mattress size before ordering.
Shared care arrangements often mean a second sleep setup at a grandparent's home. A compact cot with its own correctly sized mattress is the safer option there than improvising with a spare mattress from elsewhere.
Whatever the arrangement, the 25mm rule applies equally at every location the baby sleeps.
What Is the Difference Between Foam and Pocket Spring Cot Mattresses?
Foam mattresses suit compact cots and lighter use. Pocket spring mattresses suit standard cots and longer-term use, the pocket spring construction maintains even firmness across the surface better than foam over 2–3 years of daily use.
Foam is lighter to lift when changing sheets, which matters in the early months when you are doing it often. Pocket spring is heavier but holds its shape longer.
Both are safe when they meet AS/NZS 8811 and fit the frame correctly. The decision is about lifespan and cot size rather than safety.
How Do I Order a Baby Cot Mattress Online in Australia?
Confirm the cot model first, then order the mattress specified for it. Free metro delivery applies on orders over $150 to Sydney, Melbourne, Brisbane, Gold Coast and Canberra.
Ordering the mattress alongside the cot is the simplest path, since it removes any question about compatibility and the two arrive together.
If you are ordering separately, check the internal frame dimensions on the cot product page against the mattress size before adding to cart.
What Bedding Do I Need Alongside a Baby Cot Mattress?
A fitted sheet and a mattress protector, nothing else goes in the cot. Red Nose Australia advises no pillows, doonas, bumpers or soft toys in the sleep space for the first year. Options across baby bedding are sized to the same standard cot dimensions.
Two fitted sheets in rotation is the practical minimum, so one is always clean while the other is in the wash. A protector under the sheet handles spills without adding a layer the baby can reach.
For more on choosing the right combination, our cot mattress buying guide walks through firmness, size, and when to replace.
How Do I Choose the Right Cot Mattress for My Situation?
Choose the mattress type that suits your cot size, climate, and budget. Pocket spring for full-size cots in most climates. Foam for compact cots. Airflow for warmer climates (QLD, northern NSW). Order with the cot to confirm size compatibility before delivery.
If the budget only stretches one way, put it into fit and firmness rather than construction type. A correctly sized foam mattress that meets AS/NZS 8811 is a safer purchase than a premium pocket spring that leaves a gap at the sides.
How Are Boori Cot Mattresses Sold?
Boori cot mattresses are sold individually or as a bundle with the matching cot frame. Free metro delivery on orders over $150.
What Comes After the Cot Mattress Stage?
When your child transitions from a cot to a toddler bed (typically at 18 months to 3 years), the mattress requirement changes. Toddler beds typically use a single mattress (92x188cm). Boori single and king single mattresses are available in the kids mattress range.
The cot mattress does not carry over, the dimensions are entirely different, and a cot mattress in a toddler bed leaves gaps at the head and foot. Budget for the new mattress at the same time as the conversion kit.
As your child grows, other pieces follow the same path. Seating for meals starts with the high chair range, and a first table and chair set sits in the baby desk and chair collection.
FAQs
What is the standard cot mattress size in Australia?
The standard Australian cot mattress measures 132x70cm, this fits all Boori standard cots. Compact cot mattresses measure 119x65cm. Oval cot mattresses use a Boori-specific size of 119x64cm, which is not interchangeable with standard rectangular cot mattresses. Always measure the internal dimensions of the cot frame before ordering a mattress, and confirm that the mattress fits with no gap larger than 25mm on any side, a requirement of AS/NZS 2172:2003.
What makes a baby cot mattress safe in Australia?
A safe baby cot mattress in Australia must meet AS/NZS 8811 (the mattress safety standard) and fit the cot with no gap larger than 25mm on any side (AS/NZS 2172:2003). The mattress must be firm enough that it does not mould to the shape of the baby's head when pressed, as recommended by Red Nose Australia. Use a fitted sheet only; Red Nose advises no pillows, doonas, bumpers, or soft toys in the cot sleep space. The mattress must remain in the cot for its entire useful life, second-hand mattresses are not recommended.
What is the difference between foam and pocket spring cot mattresses?
A foam cot mattress is lighter and lower-cost, suited to compact cots and lighter use. A pocket spring mattress is heavier and more durable, each spring moves independently, maintaining even firmness across the surface over 2–3 years of daily use. An airflow mattress has a perforated surface that allows maximum air circulation, making it suited to warmer Australian climates such as Queensland and northern New South Wales where overheating risk is higher. All three types can be safe when they meet AS/NZS 8811 and fit the cot correctly.
Why should I use a new baby cot mattress instead of a second-hand one?
A second-hand cot mattress may have compressed over time, reducing the firmness that is required for safe infant sleep, Red Nose Australia recommends a firm, flat sleep surface. Previous spills and hygiene history are unknown, and the mattress may have been compressed unevenly by a previous child. Indentations in the surface can restrict airflow and affect sleeping position. For a product used daily for 2–3 years in a confined sleep space, a new mattress sized to the exact cot frame dimensions is the safest choice.
When should I replace a baby cot mattress?
Replace a baby cot mattress when: the surface shows permanent compression or indentation (no longer bounces back when pressed), the mattress has been heavily soiled despite protector use, the child transitions from cot to toddler bed (a new mattress suited to the new bed format is needed), or the mattress is more than 3 years old. Boori cot mattresses are designed for the full cot stage, approximately birth to 18 months to 3 years. Using a mattress protector from day one and rotating the mattress regularly extends useful life within the recommended period.
