Bed Sheet Sizes Australia: Complete Guide to Choosing the Right Sheets
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Buying bed sheets sounds simple until you find yourself comparing Single, King Single, Double, Queen and King sizes — and then trying to work out whether the fitted sheet will actually fit your mattress.
The good news is that choosing the right bed sheet size in Australia is relatively straightforward once you know what to measure.
For most shoppers, the key is to match your sheets to your mattress size and depth. A fitted sheet needs to match the mattress width and length, while its pocket depth needs to be deep enough to wrap securely around the mattress.
Australian mattress sizes commonly include Single, Long Single, King Single, Double, Queen, King and Super King. For reference, Onebed's Australian mattress size guide lists Queen at 153 × 203 cm and King at 183 × 203 cm, with the other standard sizes following the same Australian sizing system.
This guide explains Australian bed sheet sizes, the difference between fitted and flat sheets, and what to check before buying a new sheet set.
Australian Bed Sheet Sizes at a Glance
The easiest way to start is to match your sheet set to your mattress size.
| Australian Bed Size | Mattress Size | Recommended Sheet Size |
|---|---|---|
| Single | 92 × 188 cm | Single |
| Long Single | 92 × 203 cm | Long Single |
| King Single | 107 × 203 cm | King Single |
| Double | 138 × 188 cm | Double |
| Queen | 153 × 203 cm | Queen |
| King | 183 × 203 cm | King |
| Super King | 203 × 203 cm | Super King |
These measurements refer to the mattress rather than the bed frame. Exact bedding dimensions can vary between brands, so always check the manufacturer's measurements before purchasing.
The most important point is that sheet size and mattress size should correspond. A Queen fitted sheet, for example, is designed for a Queen mattress rather than simply any bed that looks roughly the same size.
What Size Bed Sheets Do I Need?
The simplest rule is:
Choose sheets that match your mattress size, then check the fitted sheet depth.
For example:
- Single mattress → Single sheets
- King Single mattress → King Single sheets
- Double mattress → Double sheets
- Queen mattress → Queen sheets
- King mattress → King sheets
- Super King mattress → Super King sheets
If you're unsure which mattress size you have, measure the mattress from side to side and head to foot.
This is particularly useful if your mattress is older, you've moved into a new home, or you're buying bedding from a different retailer.
Fitted Sheet vs Flat Sheet: What's the Difference?
A sheet set usually includes more than one type of sheet, and each has a different job.
Fitted Sheet
A fitted sheet has elasticated corners that wrap around the mattress.
Because it needs to fit closely, the mattress dimensions and depth matter.
A fitted sheet that is too small may pull away from the corners. One that is too large may bunch up or move during the night.
Flat Sheet
A flat sheet is a rectangular sheet that sits over the mattress and underneath the sleeper.
Unlike a fitted sheet, it does not need to wrap tightly around the mattress. It is intentionally larger so that the sides can hang over the mattress and be tucked underneath.
This means you don't need to match a flat sheet to the mattress in exactly the same way as a fitted sheet.
Pillowcases
Pillowcases are usually included with complete sheet sets, but the number can vary depending on the bed size and product.
If you're buying a complete set, check exactly what is included rather than assuming every sheet set contains the same number of pieces.
Why Mattress Depth Matters for Fitted Sheets
Mattress size tells you the width and length, but it doesn't tell you how thick the mattress is.
This matters because fitted sheets need enough pocket depth to cover the mattress.
For example, two Queen mattresses can both measure approximately 153 × 203 cm but have different heights because of their internal construction.
A thicker mattress may include:
- Multiple comfort layers
- Memory foam
- Pocket springs
- A pillow-top design
- A mattress topper
If your fitted sheet does not have enough depth, the elastic may pull away from the corners or make the sheet difficult to secure.
How to Measure Mattress Depth
Before buying fitted sheets, measure from the bottom edge of the mattress to the highest point of the sleeping surface.
If you regularly use a mattress topper, include the topper in your measurement.
The basic formula is:
Mattress width + mattress length + mattress depth = the key measurements for fitted sheets.
This takes less than a minute and can save you from buying sheets that don't fit properly.
Australian Bed Sheet Sizes by Mattress Size
Single Bed Sheet Size
A standard Australian Single mattress is approximately 92 × 188 cm.
Single sheets are commonly used for children's bedrooms, guest rooms and compact sleeping spaces.
If you have a longer mattress, check whether it is actually a Long Single or King Single before purchasing bedding.
King Single Bed Sheet Size
A King Single mattress is approximately 107 × 203 cm.
It provides more width and length than a standard Single and is popular for teenagers, taller solo sleepers and guest rooms.
Make sure you choose King Single sheets, rather than assuming Single sheets will stretch to fit.
Double Bed Sheet Size
A standard Australian Double mattress is approximately 138 × 188 cm.
Double sheets are suitable for Double mattresses and are often used in guest rooms, smaller bedrooms and by solo sleepers who want more space than a Single provides.
A Queen fitted sheet may appear large enough to cover a Double mattress, but it is unlikely to provide the secure fit you want.
Queen Bed Sheet Size
A Queen mattress is approximately 153 × 203 cm and is one of the most common mattress sizes in Australia.
For a Queen mattress, choose a Queen sheet set and check the fitted sheet depth against your mattress.
King Bed Sheet Size
A standard Australian King mattress is approximately 183 × 203 cm.
King sheets are designed for this wider mattress and are a popular choice for couples who want more personal sleeping space.
Because international bed sizes can differ, be careful when purchasing imported bedding labelled simply as "King". Check the actual dimensions rather than relying only on the size name.
Super King Bed Sheet Size
A Super King mattress is approximately 203 × 203 cm.
Because Super King bedding is less common than Queen or King bedding, checking the exact sheet dimensions before ordering is particularly important.
Can You Use a Larger Sheet on a Smaller Mattress?
It depends on the type of sheet.
A larger flat sheet can usually be used on a smaller mattress because the additional fabric can simply be tucked underneath.
A larger fitted sheet is different.
Because fitted sheets are designed to sit closely around the mattress, using one that is too large can result in:
- Loose corners
- Excess fabric
- Wrinkles
- Movement during the night
For the best fit, choose the fitted sheet that corresponds to your mattress size.
If your mattress is unusually thick, choose a sheet with greater pocket depth rather than simply buying the next mattress size up.
What About Mattress Toppers and Protectors?
Your mattress isn't always the only thing underneath your sheets.
A mattress protector or topper can increase the total height of your sleeping surface.
A thin protector may make little difference, but a thicker topper can add several centimetres.
This is why it is useful to measure your complete sleep setup before buying fitted sheets.
For example:
Mattress + topper = total depth
Your fitted sheet needs enough depth to cover both.
If you're also buying a new mattress, consider the mattress height when choosing your bedding. This can help you avoid buying sheets that fit the mattress width and length but are too shallow for the finished setup.
How to Choose the Right Bed Sheet Set
Once you know your mattress dimensions, choosing bedding becomes much easier.
1. Match the Sheet Size to Your Mattress
Start with the basic Australian mattress size: Single, King Single, Double, Queen, King or Super King.
2. Check the Fitted Sheet Depth
This is especially important for thicker mattresses and mattresses with toppers.
3. Check What's Included
If you're buying a sheet set, check whether it includes:
- Fitted sheet
- Flat sheet
- Pillowcases
The number of pillowcases can vary between sizes and brands.
4. Choose a Material You Like
Once the fit is right, consider the fabric.
Cotton remains a popular choice because it is breathable and comfortable across different seasons. The weave can also change the feel of the fabric.
For example, sateen-woven cotton generally has a smoother, softer feel and a subtle lustrous finish.
5. Check the Exact Product Dimensions
Don't rely solely on labels such as "Queen" or "King".
The size name tells you which mattress category the product is designed for, but the product specifications tell you the actual measurements and fitted-sheet depth.
What Is Included in a Onebed Sheet Set?
If you're looking for a complete bedding set rather than buying individual sheets, Onebed Sheets are designed as a complete set.
The current Onebed Sheet Set includes one flat sheet, one fitted sheet and two pillowcases. Single and King Single sets include one pillowcase. The sheets are made from 100% sateen-woven cotton with a 480 thread count, with Onebed describing the fabric as breathable, smooth and soft.
This makes a complete sheet set a convenient option when you're refreshing your bedding rather than replacing only one individual sheet.
Common Bed Sheet Size Mistakes to Avoid
Choosing Sheets Based on the Bed Frame
The bed frame can be slightly larger than the mattress.
For fitted sheets, use the mattress dimensions, not the outside dimensions of the frame.
Ignoring Mattress Depth
A Queen sheet is still a Queen sheet, but the fitted-sheet depth can determine whether it actually stays on your mattress.
Forgetting About a Mattress Topper
If you add a topper after buying your sheets, the fitted sheet may no longer have enough depth.
Assuming All Brands Measure the Same
Australian mattress sizes are relatively standard, but sheet dimensions, elastic design and pocket depth can vary between brands.
Always check the product specifications before ordering.
Frequently Asked Questions
What size sheets do I need for a Queen bed in Australia?
For a standard Australian Queen mattress measuring approximately 153 × 203 cm, choose a Queen sheet set. For fitted sheets, also check that the pocket depth is suitable for your mattress.
Are King and Super King sheets the same size?
No. An Australian King mattress is approximately 183 × 203 cm, while a Super King is approximately 203 × 203 cm. They require different sheet sizes.
Can I use Queen sheets on a Double mattress?
A Queen flat sheet can generally be used on a Double mattress, although there will be more excess fabric. A Queen fitted sheet is usually too large for a Double mattress and may not fit securely.
Do fitted sheets need to match mattress depth?
Yes. The fitted sheet needs enough pocket depth to cover the mattress securely. If you use a mattress topper, include its height when measuring.
How do I know what sheet size my mattress is?
Measure the mattress width and length, then compare the measurements with Australian mattress sizes. If you're still unsure, check the manufacturer's specifications or your original mattress documentation.
What should I look for when buying a sheet set?
Start with the correct mattress size and fitted-sheet depth. Then consider the material, weave, breathability and what pieces are included in the set.
The Bottom Line
Choosing the right bed sheet size in Australia doesn't have to be complicated.
First, match the sheet size to your mattress:
Single → Single
King Single → King Single
Double → Double
Queen → Queen
King → King
Super King → Super King
Then check the fitted sheet depth, especially if you have a thick mattress or use a topper.
Finally, if you're buying a complete sheet set, check what is included and choose a fabric that suits your preferred feel and sleeping environment.
Getting the size right first means you can focus on what matters next: finding sheets that feel comfortable, fit securely and work with your complete sleep setup.
