If you’ve ever fought with a fitted sheet that just won’t stay put, you’re not alone. Getting the right size fitted sheet can feel confusing — especially if you have an adjustable bed, caravan mattress, or something a little different.

At It-Fits®, we’ve taken the stress out of it. This guide covers all the Australian mattress sizes and explains why stretchy jersey sheets are the easiest way to get a perfect fit—every time.

Bed and Mattress Size Guide – Australian Standard Sizes

Let’s start with the basics. Here are the standard mattress sizes in Australia, plus a few extras you might not know about.

Mattress Size Guide

Single Mattress Size – Everyone’s first mattress

92 x 188 cm (36.2" x 74")

Perfect for kids, teens, or guest bedrooms.

Long Single Mattress Size – Best value for growing kids

92 x 203 cm (36.2" x 79.9")

Same width as a Single but longer—ideal for tall sleepers or single adjustable beds.

King Single Mattress Size – Perfect step up from a single

107 x 203 cm (41.5" x 79.9")

A little wider and longer, often used for single electric or adjustable beds.

Double Mattress Size – A generous size for an adult

138 x 188 cm (53.9" x 74")

Great for solo sleepers who love space or couples with smaller rooms.

Long Double Mattress Size – Extra length for solo adjustable beds

138 x 203 cm (53.9" x 79.9")

Same width as a Double, but longer—popular for single adjustable or electric beds.

Queen Mattress Size – The minimum choice for couples

153 x 203 cm (60" x 79.9")

Australia’s most popular mattress size for couples.

Split or Dual Queen – Adjustable bed option for couples

2 x 76 x 203 cm (approx.) (2 x 30" x 79.9")

Two long singles side by side, perfect for couples who want individual adjustment.

King Mattress Size – Extra space for couples

183 x 203 cm (72" x 79.9")

Great for couples who love extra room to stretch out.

Split or Dual King – Popular adjustable bed option for couples

2 x 92 x 203 cm (2 x 36.2" x 79.9")

Two long singles side by side—perfect for dual control adjustable beds.

Super King Mattress Size – Maximum sleep space

203 x 203 cm (79.9" x 79.9")

The largest standard size in Australia.

Split or Dual California King (Super King Split)

2 x 107 x 203 cm (2 x 41.5" x 79.9")

Two King Singles side by side—ideal for luxury adjustable beds that offer extra width and length.

Now that you know the mattress sizes — let’s talk room fit.

Choosing the right mattress size isn’t just about your sleep style. It’s also about making sure it fits comfortably in your space. Whether you’re upgrading your own bed or setting up a guest room, here’s how to make sure your mattress works with your bedroom layout.

How to Measure Your Bedroom for a Bed

• Measure the length and width of your bedroom.

• Leave at least 60–90 cm of walking space around the bed.

• Consider space for furniture, doors, and pathways.

Standard Bed and Mattress Sizes

Most bedding is made to fit these sizes. But It-Fits® fitted sheets go a step further by stretching to fit tricky or non-standard beds, including adjustable and caravan mattresses.

Your Guide to Mattress Sizes in Australia

So, What Mattress Size Should You Get?

Earlier, we looked at how to choose the right bed size for your room — but what about your lifestyle, sleep preferences, or specific bed type?

Here’s a quick overview to help you decide what suits your needs best.

What is the Best Mattress Size for You?

• Solo sleeper in a small space? Single, Long Single, or King Single.

• Couple with limited space? Double or Queen.

• Couple wanting more room? King or Super King.

• Adjustable or caravan bed? Measure carefully and check our Fitted Sheet Size Guide.

Let’s Talk About the Tricky Beds

Not all beds are standard. Adjustable and caravan mattresses come with their own unique sizing and shape challenges.

And here’s where most fitted sheets fail.

Let’s take a look at why regular sheets don’t work for these special beds — and how It-Fits® makes it easy.

What is an Adjustable Bed and Why Don’t Normal Sheets Work?

An adjustable bed (also called an electric or hospital bed) lets you raise or lower parts of the mattress—like your head, legs, or both—for better comfort or health support.

But here’s the problem:

Standard fitted sheets aren’t made to move with the bed. They pop off, bunch up, or slip loose, making bed-making a nightmare.

It-Fits® fitted sheets are made from stretchy cotton jersey, with a 360° elastic hem. They move with your bed, staying snug and secure all night—no matter how much you adjust.

What Size Sheets Fit a Caravan Bed?

Caravan beds are notoriously tricky, with non-standard shapes and sizes.

Luckily, It-Fits® caravan fitted sheets stretch to fit small singles, rounded corners, and custom caravan mattresses.

Unlike stiff woven sheets that slip or bunch, our stretchy jersey fabric hugs your mattress—no matter the size or shape.

Not sure what size you need? Try our Fitted Sheet Size Guide and let our quick quiz help you find your perfect fit.

Left hand side: It-fits Small single fitted sheet, Right hand side: Traditional woven single fitted sheet

FAQs

How can I check if I’ve got the right size?

Not sure which sheet to choose? Use our Fitted Sheet Size Guide — it’s quick and simple, and will help you choose the perfect fit, whether your bed is standard, adjustable, or custom-sized.

What is a Split or Dual Queen Bed?

Two Small Single mattresses placed side by side to form a Queen. Perfect for dual control adjustable beds.

What is a Split or Dual King Bed?

Two Long Single mattresses placed side by side to form a King. Ideal for adjustable beds where each person wants individual control.

What is a Split or Dual California King?

In Australia, this is the same as a Super King Split—two King Single mattresses (2 x 107 x 203 cm) side by side, giving maximum space and length for premium adjustable beds.

Are your fitted sheets really stretchy?

Yes! Our 100% Australian cotton jersey sheets stretch to fit deep, shallow, adjustable, or non-standard beds—no more popping corners or bunching.

Are your sheets good for adjustable and caravan beds?

Absolutely. Our super-stretchy jersey fabric and 360° elastic hem make them perfect for adjustable beds and caravan mattresses, no matter the shape or size.

Are your sheets breathable and comfortable?

Definitely. Our jersey sheets feel like your favourite soft T-shirt—breathable, comfy, and temperature-regulating for year-round comfort.

Ready to Find Your Perfect Fitted Sheet?

Don’t let tricky mattresses or popping corners ruin your sleep. Find your perfect fit today with our Fitted Sheet Size Guide or browse our Knitted Jersey Fitted Sheets Collection.

Sweet dreams start with a better fit. 😴