Our overall score is based on our safety tests only. We test mattresses against the Australian/NZ standard for mattress firmness, as well as checking the measurements of the mattress. Certain discrepancies between stated and actual dimensions can cause a safety hazard, so these are recorded and scored.

Whether the cot mattresses pass the sleep surface test method for firmness, AS/NZS 9911.1:2013. Parents are advised by safety experts to always choose a 'firm' mattress to minimise the risk of sudden unexpected death in infancy (SUDI).

Our recommended models all pass the standard test for sleep surface firmness, AS/NZS 8811.1:2013 which involves placing a test apparatus and assessing softness at various points. In addition, CHOICE also checks to see if mattress dimensions are as accurate as claimed/advertised measurements.

The RRP at the time of testing. If the price is $0 this is because the mattress comes included with a cot and is not available for individual purchase. Check the good points for the model for more details.

The width of the mattress according to our measurements. This may differ from the product's claimed width. 

The length of the mattress according to our measurements. This may differ from the product's claimed length. 

The thickness or depth of the mattress according to our measurements. This may differ from the product's claimed thickness. 

These are the claimed measurements of the mattress which may be present on the packaging or on retail websites.