Australian Mattress Sizes & Bed Dimensions Guide

Australian Mattress & Bed Sizes Explained

Australian mattress sizes come in six standard options: Single (92 x 188 cm), Long Single (92 x 203 cm), King Single (107 x 203 cm), Double (138 x 188 cm), Queen (152 x 203 cm) and King (183 x 203 cm). Because these dimensions follow a common national standard, a Queen from one brand is the same size as a Queen from another, give or take a centimetre. This guide breaks down every Australian mattress and bed dimension in centimetres and inches, explains who each size suits and how much room it needs, covers Split King and Super King setups, and helps you match the right size to your bedroom and your sleepers.

Australian mattress sizes chart

Here is every standard Australian mattress size at a glance. Each Zenna latex mattress is made to these measurements at a consistent 20 cm height, which is a low profile that fits standard fitted sheets and sits neatly on most bases.

Prefer to work backwards from a measurement? If your mattress is 152 cm wide, it is a Queen; 183 cm wide, it is a King, and anything 203 cm long is a King Single, Long Single, Queen, or King. Read on for a full breakdown of each size.

Single mattress size

A Single mattress measures 92 x 188 cm (36 x 74 inches). It is the most compact standard size in Australia, which makes it the go-to for children’s rooms, guest rooms and single sleepers in smaller bedrooms. A Single fits comfortably in a room from around 2.5 x 2.4 m. If you or your child is on the taller side, step up to a Long Single for the extra length without using any more floor width. Explore the Single latex mattress.

Long Single mattress size

A Long Single mattress measures 92 x 203 cm (36 x 80 inches). It keeps the 92 cm width of a standard Single but adds 15 cm of length, matching the 203 cm length of a King Single, Queen and King. That extra legroom suits taller solo sleepers, and because two Long Singles side by side make up a King, this size is also the building block of a Split King setup (more on that below). See the Long Single latex mattress.

King Single mattress size

A King Single mattress measures 107 x 203 cm (42 x 80 inches), giving 15 cm more width and 15 cm more length than a standard Single. It is a favourite for teenagers, growing children and taller solo sleepers who want more room to stretch out without moving up to a Double. Allow a bedroom of roughly 3.0 x 2.5 m. Browse the King Single latex mattress.

Double mattress size

A Double mattress measures 138 x 188 cm (54 x 74 inches). It gives a single sleeper plenty of room to spread out and works for couples in compact bedrooms, though at 69 cm of width each, two adults have less personal space than in a Queen. A Double suits a room from about 3.0 x 3.0 m. View the Double latex mattress.

Queen mattress size

A Queen mattress measures 152 x 203 cm (60 x 80 inches) and is the most common size in Australian homes, with the majority of couples choosing one. It balances comfortable width for two people with a footprint that fits most main bedrooms, ideally around 3.0 x 3.4 m or larger. If your room can take it and you want more elbow room, compare it against a King below. See the Queen latex mattress.

King mattress size

A King mattress measures 183 x 203 cm (72 x 80 inches), which is 30 cm wider than a Queen and gives each person in a couple the same width as a Single sleeper. It is the largest size Zenna makes, and it suits couples who want maximum space or who often share the bed with children or pets. A King needs a generous room, ideally around 3.5 x 4.0 m, so there is walking space on both sides. Explore the King latex mattress.

What is a Split King mattress?

A Split King is two Long Single mattresses (92 x 203 cm each) placed side by side, which together match the 183 to 184 cm width of a standard King at the same 203 cm length. Instead of one large mattress, you sleep on two independent halves. This is the setup of choice for adjustable bases, because each side can be raised or reclined on its own, and it also lets couples pick a different feel on each side and all but removes partner disturbance when one person moves. If a Split King appeals, you simply order two Long Single latex mattresses and pair them on a King or split base.

Is there a size bigger than a King?

Yes. The Super King is the largest standard Australian mattress at 203 x 203 cm, a perfect square that adds another 20 cm of width over a King. It is a niche size found in very large main bedrooms and takes non-standard bedding, which is part of why few Australian homes use one. Zenna’s range runs from Single through to King, the sizes that fit the vast majority of Australian bedrooms, with a Split King available for couples who want two independent halves at King width.

Australian sizes are not the same as US or UK sizes

Mattress size names travel across countries, but the dimensions do not, so always match the centimetres rather than the label. An Australian Queen (152 x 203 cm), for example, is not the same as a US Queen, and “King Single” is an Australian and New Zealand term with no direct US equivalent. There is also no California King in Australia. This mostly matters when you buy bedding or a bed frame from overseas: check the actual dimensions against the chart above so your sheets and base fit an Australian mattress.

Does mattress height affect the size?

Height does not change the length or width, but it does affect how your bedding fits and how the bed feels to get in and out of. Every Zenna mattress is a consistent 20 cm high, a lower profile than many pillow-top or spring mattresses that run 30 cm or more. The practical upside is that standard fitted sheets slip on easily without straining at the corners, and the mattress sits at a comfortable, easy-to-reach height on most bases and frames.

How to choose the right mattress size

• Measure your room first. Leave at least 60 cm of walking space around the bed wherever you can, and remember a bed frame is larger than the mattress it holds.
• Match the size to the sleepers. Solo sleepers are well served by a Single through to a Double, while couples are usually most comfortable in a Queen or King.
• Think about height. Taller sleepers benefit from the 203 cm length of a Long Single, King Single, Queen or King.
• Consider an adjustable or split setup. If you and your partner want different positions or feels, a Split King made from two Long Singles gives each of you an independent half.
• Check your bed base. Your base or frame should match your chosen mattress size for proper support and to protect the mattress.

Mattress size versus bed frame size

Your mattress size and your bed frame size are not the same number. A bed frame is built slightly larger than the mattress so the mattress sits inside or on top of it, and its external footprint also includes the headboard, any surround, and the legs. When you are planning your bedroom layout, measure the outside of the frame or base rather than the mattress, then add clearance to walk around it. If you are ordering a base to suit your new mattress, match it to the mattress size in the chart above.

Frequently asked questions

What are the dimensions of a Queen size mattress in Australia?

An Australian Queen mattress measures 152 x 203 cm (60 x 80 inches). It is the most common size in Australian homes.

What size is a King mattress in Australia?

An Australian King mattress measures 183 x 203 cm (72 x 80 inches), making it the widest standard size and 30 cm wider than a Queen.

How big is a King Single mattress?

A King Single measures 107 x 203 cm. It is wider and longer than a standard Single but narrower than a Double, making it popular among teens and taller solo sleepers.

What is the difference between a Single and a Long Single?

Both are 92 cm wide. A Single is 188 cm long, while a Long Single is 203 cm long, giving taller sleepers an extra 15 cm of legroom.

What is a Split King and what size is it?

A Split King is two Long Single mattresses (92 x 203 cm each) side by side, matching the width of a King at 203 cm long. It is popular on adjustable bases because each side moves independently.

What is the biggest mattress size in Australia?

The Super King is the largest standard Australian mattress at 203 x 203 cm. The King (183 x 203 cm) is the largest size Zenna makes and fits far more bedrooms.

Which mattress size is most common in Australia?

The Queen is the most common mattress size in Australian homes, because it fits most main bedrooms while giving couples comfortable width.

Do Australian mattress sizes match US or UK sizes?

No. The names overlap, but the dimensions differ, so match the measurements in centimetres rather than the size name, especially when buying bedding or a frame from overseas.

Find your size in natural latex

Every Zenna mattress is made from one solid block of 100 percent natural European latex, is CHOICE Recommended, and comes in all six standard Australian sizes with a 25-year warranty and a 100-night trial. Shop the Zenna latex mattress range and choose the size that fits your bed. If you would like to fine-tune the feel, add a natural latex mattress topper.