Cot Mattress Sizes Explained: Find the Perfect Fit for Your Baby’s Cot
A cot mattress (also called a baby crib mattress) is sized to fit in a baby’s cot or crib. Getting the right size is important for safety (no big gaps), comfort, hygiene, and to make sure bedding fits properly.
In Australia, from 26 January 2026 all cot mattresses must comply with the Consumer Goods (Infant Sleep Products) Safety Standard 2024.
Australian Typical Cot Mattress Sizes
|
Type |
Typical Dimension (L x W) |
Where / When Used |
|
Standard cot mattress (this is also the Cariboo cot mattress size) |
130 x 69 cm |
This is the most common size in Australia. Fits most cots / cribs for approx birth → 2-3 years. |
|
Compact cot mattress |
108 x 53cm |
Used in smaller cots (“compact” cots), for smaller nursery spaces or where portability is needed. |
|
Bassinets / bedside sleepers (such as SnüzPod)
|
80 x 40cm to 70 x 35 cm
SnüzPod3/ SnüzPod5: 80x44cm SnüzPod4: 75.5x40cm SnüzPod Studio: 78cmx44cm |
These vary a lot by brand & style; always measure the specific bassinet. |
New Zealand Typical Cot Mattress Sizes
New Zealand has very similar sizes to Australia, with a few additional “non-standard” or legacy cot sizes still floating around.
|
Type |
Typical Dimension (L x W) |
Where / When Used |
|
American-size cot (current “standard” NZ) (Cariboo mattress size) |
130 x 69 cm |
This has become the de facto standard in NZ for new cots. Bedding and mattresses are widely available in this size. |
|
Old NZ / Euro / UK standard cot (legacy) |
~ 60 × 120 cm (or 59 × 119 cm) |
These are now uncommon in NZ, more likely found in older or handed-down cots. |
|
Large / Boori cot size
|
~ 77 × 132–135 cm |
More common in Australia, but still seen in NZ. Requires larger mattress & bedding. |
|
Bassinets / bedside sleepers (such as SnüzPod)
|
80 x 40cm to 70 x 35 cm
SnüzPod3/ SnüzPod5: 80x44cm SnüzPod4: 75.5x40cm SnüzPod Studio: 78cmx44cm |
These vary a lot by brand & style; always measure the specific bassinet. |
Practical Tips for Choosing the Right Cot Mattress
Measure your cot base: length & width inside; check how much gap there is currently.
Decide standard vs compact: If space is tight, a compact cot might be better, but expect less growth room.
Check the mattress firmness: Soft mattresses increase risk; firm surfaces are safer for infants. Look for a mattress that complies with the Australian Consumer Goods (Infant Sleep Products) Safety Standard 2024
Look at materials & breathability: Covers that are washable; breathable foam or materials help with temperature comfort and hygiene.
Future proofing: If planning to use the cot for more than one child or pass it on, stick to a more common size (e.g. 130 × 69 cm) so parts / linen continue to be easy to find.
How to Choose the Right Cot Mattress in Australia & New Zealand
Choosing a cot mattress can feel overwhelming—there are dozens of sizes, materials, and safety standards to consider. The right mattress keeps your baby safe, comfortable, and supported through every nap and nighttime sleep. Here’s a detailed guide to help parents in Australia and New Zealand pick the perfect fit.
1. Measure Your Cot First
Before shopping, measure the internal base length and width of your cot or crib. Even “standard” cots can vary slightly.
NZ & AU Standard Size: Around 130 × 69 cm.
Compact Cots: Approx. 108 × 53 cm.
Legacy or Euro Cots: May be 120 × 60 cm or larger options like 132–135 × 77 cm.
-> Tip: The mattress should fit snugly, with no more than a 2 cm gap between the mattress edge and cot side when centred, or 4 cm when pushed to one side. This prevents entrapment risks.
2. Check Thickness and Firmness
For safe sleep, a firm surface is best. Soft mattresses can increase SIDS risk. Look for:
• Thickness: Around 10-12cm is common, but always check your cot’s instructions.
• Firmness Test: Press the center—your hand should not leave a deep indentation.
• Even Support: Foam or innerspring are fine if they meet safety standards and feel firm.
3. Know the Standards
In Australia and NZ, look for products that comply Consumer Goods (Infant Sleep Products) Safety Standard 2025 and other local safety recommendations. Reputable brands and retailers will list compliance details.
4. Choose Safe Materials
Consider:
• Waterproof Covers: Protects against leaks and reduces the risk of mould while remaining breathable.
• Washable Covers: Zippered or removable covers make cleaning easier.
• Hypoallergenic Options: Cotton or bamboo covers can help sensitive skin. Memory Foam mattresses such as the Cariboo Tru-Sleep mattress naturally prevent dust mites and other allergens due to their dense nature https://pubmed.ncbi.nlm.nih.gov/12028120/
5. Match Bedding & Accessories
Choosing a common size (130 × 69 cm) ensures fitted sheets and mattress protectors are easy to find in NZ and AU stores. For specialty sizes (like SnüzKot or SnüzPod bassinets), buy bedding designed for those exact dimensions.
6. Factor in Longevity & Growth
Think about how long you plan to use the cot:
• Convertible Cot Beds: Cariboo Cots can transition into toddler beds.
• Compact Cots: Great for smaller spaces or travel, but your baby may outgrow them faster.
7. Inspect Quality Before Purchase
• Edges: Reinforced edges reduce sagging when your baby begins to stand.
• Warranty: Quality brands often offer a 1–3 year warranty.
• Brand Reputation: Choose trusted manufacturers who publish their safety testing and use high-quality materials.
Quick Comparison Table
|
Cot Type |
Typical Mattress Size (cm) |
Best For |
|
Standard Cot |
130 × 69 |
Most NZ/AU parents, easy bedding |
|
Compact Cot |
108 × 53 |
Apartments, smaller spaces |
|
Euro/Legacy Cot |
120 × 60 |
Hand-me-downs, older cots |
|
Bassinet (e.g., SnuzPod 5) |
80 × 44 |
Newborn stage only |
Final Tips for Parents
• Always measure before you buy, even “standard” cots can vary.
• Pick firm, breathable, and washable mattresses.
• Stick to well-known brands with clear safety compliance.
• When in doubt, ask the retailer or manufacturer for recommended mattress options for your cot model.
