What are queen mattress dimensions in Australia? The standard dimensions of an Australian queen mattress are 153 cm x 203 cm. The queen bed is the most popular size when it’s comes to buying a new mattress. The perfect size for two or stretching out when you have the bed to yourself. All our mattresses are Australian made and we only use environmentally friendly ingredients: GECA approved foams and natural fabrics. Plus, all of our mattresses are covered by a 10-year guarantee, so you can be sure you’re investing in a quality mattress that will stand the test of time. So, if you’re looking for your perfect queen size mattress visit our Sydney showroom in Rozelle.