Buying a mattress that’s too small is one of the biggest mistakes new bed-buyers make. This guide will help you understand mattress sizing, along with recommendations to find your best fit.

A single mattress is the smallest possible mattress size other than a crib-size mattress used for a baby. Single mattress dimensions are approximately 915mm wide by 1880mm long (standard length). Generally, this type of mattress is more suited for a child’s bedroom.

The size of a “Three Quarter” mattress is 1070mm wide (155mm wider than a single) with a standard length of 1880mm, also used for a child’s bedroom.

A double mattress, or sometimes called a full-size mattress is 1370mm wide, which is just 455mm wider than a single size. For a couple sharing a bed, that leaves each partner only 685mm of personal space. Parents are increasingly choosing a double mattress size over a “Three Quarter” size for teenagers’ bedroom.

The Queen mattress dimensions are 1520mm wide by approximately 1880mm long (Standard length). The added width can make all the difference in comfort, especially for couples, which is why it’s the most popular mattress size. A queen-size mattress is a good choice for single sleepers who may find that they prefer plenty of space when snoozing, and the increased size of the queen over a double-size mattress makes for the ideal fit.

The king-size mattress dimensions are 1830mm wide by approximately 1880mm long (Standard length) – about 310mm wider than a queen. This is the closest a couple can come to having as much personal space (915mm) as each would have on a single bed. A king-size mattress is the best choice for couples who want maximum personal sleeping space. To ensure that the king-size mattress will fit nicely into your bedroom, check your bedroom dimensions, especially in some of the newer built townhouse homes.

The super king-size mattress is 200x 200 (longer and wider than a King-size mattress).

We tried to keep everything as simple as possible, but we understand that you might not be familiar with some of the terms we used. To help you get an idea what each of these questions means, we’ve listed them in order with detailed explanation.


This is the construction and material used to build the bed. We have a handful of options here and many properties directly depend on this:


Memory Foam – Moulds to the body in response to heat and pressure evenly distributing body weight. It then returns to its original shape once pressure is removed.


Gel Memory Foam – is specially formulated memory foam that contains gel beads, designed to help absorb heat and draw it away from the sleeper. Additionally, the cellular structure of the memory foam itself is optimised for increased air flow.


Latex – More expensive but also more durable and much cooler than any foam.


This represents the overall capability of a mattress to disperse heat and prevent creating “hot spots.” Cooling mattresses excel at regulating temperature so sleepers don’t over heat during the night. Many mattress layers and fabrics can contribute to temperature regulation. Various cooling materials are used in Sealy, Edblo, Slumberalnd and King Koil mattresses.


This is a very subjective thing, and it’s rarely the same for everyone. Sealy, Edblo, Slumberland and King Koil offer multiple firmness levels for this reason. For more information check the firmness guide.

Edge Support:

Have you ever fallen off the bed? Not a good thing, I know. Sealy, Edblo Slumberland and King Koil offer various edge support systems, that allows for a firmer seating edge and a wider sleeping surface. Edge Support in a mattress also stabilizers the spring unit, preventing side-sway.

Motion Transfer:

Sleeping with a partner? Sealy, Edblo, Slumberland and King Koil mattresses offer low motion transfer for reduced partner disturbance.


All of the top brands like Sealy, Edblo, Slumberland and King Koil have very good warranties, and consumers are encouraged to make sure that they have registered the warranty with the brand manufacturer.


As you spend 8 hours a day sleeping, make sure to invest in the best possible quality mattress that you can afford to ensure a great night’s sleep with proper comfort and support.