The Ultimate Guide to Australian Bedding Sizes Australian Bedding Sizes are unique and differ from those in the US, UK, Europe and Asia Understanding the different sizes of a mattress, bed linen (fitted sheets and Flat sheets) quilt covers (donnas) bed skirts and pillowcases/pillow shams is important before you make a purchase. Mattress height is worth noting. The average height of a mattress in Australia is about 30cm with cots about 19cm. Mattress height is important because some fitted sheets may not fit properly, so when buying fitted sheets purchase the right height for your mattress. What Size is my…