
There are a variety of cot mattress sizes available in Australia, and choosing the right one is crucial for your baby's safety and comfort. The standard Australian cot mattress size is 69 cm by 130 cm, which typically fits a standard rectangular cot or crib and accommodates children from birth up to around 2-3 years. Compact or mini cot mattresses, measuring 120 cm by 60 cm, are perfect for smaller spaces or parents who prefer a compact sleeping area for the first 6 months. Additionally, bassinet mattress sizes vary, usually measuring around 40 cm by 80 cm, while travel cots typically sit at 100 cm by 70 cm. It's important to check manufacturer guidelines, as exact dimensions can vary by brand. Safety standards and certifications, such as those provided by Red Nose Australia, are also essential to consider when choosing a cot mattress.
| Characteristics | Values |
|---|---|
| Standard cot mattress size | 130cm x 69cm (51.18″x27.16″) |
| Compact cot mattress size | 108cm x 53cm (43″x21″) |
| Bassinet mattress size | 70-80cm x 30-40cm |
| Mini cot mattress size | 120 x 60cm (47.24″ x 23.62″) |
| Travel cot mattress size | 1000 x 700mm |
| Standard baby mattress size | 28 inches x 52 inches (71 cm x 132 cm) |
| Standard toddler mattress size | 28 inches x 63 inches (71 cm x 160 cm) |
| Standard cot bed mattress size | 28 inches x 70 inches (71 cm x 178 cm) |
| Mattress thickness | 4″-6″ (100mm-150mm) |
| Gap between mattress and cot frame | Less than 2 cm |
| Gap between mattress and cot side | Less than 20 mm |
| Mattress type | Firm, flat, single, breathable |
| Mattress material | High-density foam, natural latex, cotton, innersprung, foam |
| Safety certifications | Juvenile Products Manufacturers Association (JPMA), Red Nose Australia, Consumer Product Safety Commission (CPSC) |
| Safety standards | Australian Safety Standards, AS/NZS 8811.1:2013 |
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What You'll Learn

Standard cot mattress size
In Australia, the standard cot mattress size is 69 x 130 cm, or approximately 27 x 51 inches. This size typically fits a standard rectangular cot or crib and is one of the most common sizes on the market, accommodating a child from birth up to around 2 to 3 years.
The standard size suits most full-size cots and is one of the two key sizes for baby cots and cribs in Australia, the other being compact. Compact cots are shorter and narrower than the standard size, measuring 108cm in length and 53cm in width. They are ideal for children up to 2 years of age and are a space-saving option for smaller rooms.
When choosing a cot mattress, it is important to consider the age, height, and weight limit of the mattress to ensure it is right for your child and your family. It is also crucial to follow the safety information provided on the label or in the assembly instructions. Under Australian mandatory product safety standards, new cots must come with a recommended mattress size and thickness that is appropriate for the frame and safe for your baby.
Additionally, it is worth noting that the size of a bassinet mattress can vary depending on the brand and shape, and there is no government-regulated standard size for mini cribs or bassinets. However, bassinets are typically smaller than cots and are popular for infants up to 6 months, often used for daytime naps or placed by your bed at night.
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Compact or mini cots
In Australia, cot mattresses typically fall into two size categories: standard and compact. The standard size is 130 cm by 69 cm, which usually fits a rectangular cot or crib and is the most common size available. Compact or mini cot mattresses, on the other hand, are smaller, measuring 108 cm by 53 cm according to one source, and 120 cm by 60 cm according to another. These compact cots are ideal for smaller spaces, travel, or parents who prefer a smaller sleeping area for their newborns during the first six months. They are designed to fit perfectly into small nurseries or next to your bed, offering a space-saving option without compromising on features.
When choosing a compact cot mattress, it is important to ensure that it complies with the Australian Cot Standard 2172. Additionally, always opt for a firm mattress that resists indentation under the baby's head to reduce the risk of Sudden Infant Death Syndrome (SIDS). The mattress should also be breathable, with cotton covers and open-cell cores to help regulate temperature in rooms between 20 and 22 degrees Celsius.
It is worth noting that the size of a bassinet mattress, which is smaller than a cot mattress, varies depending on the brand and shape. They are typically in the range of 70 to 80 cm long and 30 to 40 cm wide, but it is advisable to check with the manufacturer or retailer for precise measurements.
When selecting a compact cot, consider features such as adjustable base heights, easy storage and transport, and open slats for airflow. For example, the Stokke Sleepi Mini has a unique oval shape that creates a safe and cosy space for your baby. Additionally, look for cots with a convertible design that can transition from a cot to a toddler bed or sofa bed, providing longevity and saving you from purchasing multiple pieces of furniture as your child grows.
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Safety certifications
When it comes to safety certifications for cots and mattresses in Australia, there are a number of mandatory standards and recommendations to ensure the safety of infants. Here are some key points to consider:
Mandatory Standards
The ACCC Product Safety sets out mandatory requirements for household cots in Australia. These standards apply to all household cots used as permanent sleeping enclosures, including rectangular cots with slat walls, circular cots without slats, and convertible cots. All new and second-hand cots must meet the Australian and New Zealand Standard for Cots (AS/NZS 2172:2003) and carry a label indicating compliance. Antique and collectable cots are exempt from this standard but must be supplied with a certificate and permanent label stating they are not for sleeping.
Safety Markings and Warnings
Household cots must have legible, durable, and prominent safety warning markings. These markings provide essential information about the safe use of the cot and mattress. It is important to follow these markings and warnings to ensure your child's safety.
Mattress Safety
While there is no overall mandatory standard for cot mattresses in Australia, the Australian and New Zealand Standard for mattress firmness (AS/NZS 8811.1:2013) provides guidelines. Safe cot mattresses are typically firm, flat, level, well-fitting, and clean. It is recommended to use a single mattress that fits snugly within 20 mm of the sides and ends of the cot. The mattress should be flat, not tilted or elevated, and made of high-density foam or natural latex for breathability and firmness. Reusing a mattress is generally not recommended unless it meets the current safety standards and shows no signs of wear and tear.
Compliance and Enforcement
Fines and penalties may be imposed for non-compliance with mandatory safety standards. Suppliers are responsible for ensuring their products meet the mandatory standards and may need to recall products that are unsafe or do not meet the required standards. It is important for consumers to check for compliance with these safety standards before purchasing or using any cot or mattress.
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Bassinet mattress size
In Australia, bassinets are smaller than cots and are typically used for infants up to 6 months old. They are often used for daytime naps or placed beside the parents' bed at night. The size of a bassinet mattress varies depending on the brand and shape. There is no universal bassinet mattress size, and they come in a wide variety of sizes. They are typically in the range of 70-80 cm long and 30-40 cm wide. Some common bassinet mattress sizes are 40 x 80 cm, 47 x 92 cm, and 33" x 18" (83.82 cm x 45.72 cm).
When choosing a bassinet mattress, safety is the top priority. The mattress should fit snugly inside the bassinet with no gaps between the bassinet wall and the mattress edge. It is also important to choose a reputable brand that specializes in bassinet and crib mattresses to ensure a high-quality, safe product. Some bassinets come with a mattress included, but if not, or if you are not pleased with the included mattress, you will need to purchase one separately. Always check the manufacturer's compatibility instructions before making a purchase. If you do not have those instructions, you can measure the inside of your bassinet to determine the best size. Bassinet mattresses can range in price from around $30 to $100, depending on factors like size, thickness, and materials.
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Mattress thickness
When it comes to cot mattresses in Australia, there are two main categories: standard and compact. The thickness of the mattress is an important consideration, as it can impact the safety and comfort of your child.
The ideal thickness for a cot mattress is around 100 mm, with a maximum thickness of 150 mm. This ensures correct sheet fitting and firmness. A mattress that is too thick may not fit properly in the cot, creating gaps that can pose a safety risk for the child. A snug fit is important to prevent little limbs from getting trapped and to support healthy spinal development.
Australian safety standards recommend choosing a firm mattress that resists indentation under the baby's head. Firm, flat surfaces made from high-density foam or natural latex are ideal. This helps to reduce the risk of Sudden Infant Death Syndrome (SIDS) and encourages proper spinal alignment.
It is worth noting that the mattress thickness can also affect the cot's compliance with mandatory safety standards for cot depth. The distance from the top of the mattress to the top of the lowest side when the dropside is closed should be at least 50 cm in the lowest position and at least 30 cm in the upper position.
Some mattresses, such as the Tasman Eco Premium Pocket Spring Mattress, offer an extra layer of foam or latex to add comfort while maintaining the required firmness and temperature regulation.
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Frequently asked questions
The standard cot mattress size in Australia is 69 cm by 130 cm, or approximately 27 inches by 51 inches. This size typically fits a standard rectangular cot or crib and accommodates a child up to 2-3 years.
Yes, in addition to the standard size, there are two other popular sizes: mini or compact cots and shaped cots. Mini or compact cots are smaller and measure around 120 x 60 cm or 53 x 108 cm. Shaped cots, such as the oval-shaped Kaylula Sova, may have varying dimensions depending on the brand.
It is important to choose a firm mattress that is snugly fitted to the cot to reduce the risk of SIDS (Sudden Infant Death Syndrome). The distance between the mattress and the cot frame should not exceed 2 cm, and any gaps larger than 20 mm can pose a safety hazard. Additionally, look for safety certifications from organisations like Red Nose Australia or the Juvenile Products Manufacturers Association (JPMA).
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