Quick answer: choose a Single mattress when the bedroom needs clear walking space, a study zone or one-person guest use; choose a Double mattress when the room can spare the extra width and the bed needs to feel more flexible for adults or occasional shared use. In the BOXY Hybrid Mattress range, Single is 920 x 1880 x 300mm and Double is 1380 x 1880 x 300mm, so the Double adds 460mm of width while keeping the same 1880mm length.
Single vs Double mattress: the key difference
The main difference between a Single and Double mattress is width. A Single mattress is the narrowest full-length BOXY option, while a Double gives one sleeper more spread-out room and can work for occasional two-person use when the bedroom layout allows it.
For small bedrooms, that extra 460mm matters. It can affect whether bedside storage fits, whether drawers open, whether a desk remains usable and whether there is a comfortable path around the bed.
| BOXY size | Dimensions | Best small-room use | Commercial page |
|---|---|---|---|
| Single | 920 x 1880 x 300mm | One sleeper, kids rooms, study bedrooms, tighter guest rooms | BOXY Single Hybrid Mattress |
| Double | 1380 x 1880 x 300mm | One sleeper wanting more width, studio bedrooms, occasional guest sharing | BOXY Double Hybrid Mattress |
Start with the room, not the mattress
Before comparing mattress sizes, map the usable bedroom space. Measure wall to wall, then subtract anything fixed: wardrobes, door swings, heaters, window clearances, built-in desks or furniture that cannot move.
A small bedroom can look large enough on paper, then feel tight once the bed, base, bedding, drawers and walking path are included. Use painter's tape or folded towels on the floor to mark the mattress footprint before ordering.
Minimum checks before choosing
- Can the bedroom door open without hitting the bed or base?
- Can wardrobe doors, drawers or under-bed storage open fully enough to use?
- Is there a walking path on at least one practical side of the bed?
- Will a bedside table, desk or tallboy still fit where it needs to be used?
- Can the boxed mattress be moved to the room before unboxing?
When a Single mattress makes more sense
A Single mattress is usually the better choice when the room has to do more than sleep. That might mean a child's bedroom with toy storage, a study that becomes a guest room, or an apartment bedroom where every centimetre affects daily movement.
The BOXY Single Hybrid Mattress keeps the same 30cm profile as the larger BOXY sizes. It uses comfort foam and memory foam above independent pocket springs, with a breathable base fabric beneath the spring layer. The narrower footprint simply gives the room more usable floor area.
Choose Single if the room needs a second function
If the room also needs a desk, clothes storage or exercise space, a Single can keep the layout calmer. It also leaves more flexibility to place the bed against a wall while preserving an open side for changing sheets and getting in and out.
When a Double mattress is worth the extra width
A Double mattress can be the better small-bedroom choice when the room is mainly for sleeping and one person wants a wider surface. It can also suit guest rooms where adult guests may prefer more width than a Single.
The BOXY Double Hybrid Mattress is 1380mm wide, so compare the room plan carefully before choosing it. The extra width is useful only if it does not block storage, door movement or the walking path you need every day.
Choose Double if the bed is the room's priority
In a studio or compact main bedroom, a Double can make sense when other furniture is minimal. Pair it with a simple supportive base, low visual clutter and storage that does not need a wide swing path beside the bed.
Room layout examples
The right answer often depends on how the room is used. Use these examples as planning prompts rather than fixed rules.
| Room type | Single is stronger when... | Double is stronger when... |
|---|---|---|
| Child or teen bedroom | The room needs study space, toy storage or open floor area. | The room is wider and sleep space is more important than floor space. |
| Guest room | The room doubles as an office or hobby room most days. | Guests are adults and the room can still fit luggage and storage. |
| Studio apartment | The bed shares space with living, dining or work zones. | The sleeping area is clearly separated and furniture is minimal. |
Check mattress height and base height together
Width and length are only part of the decision. BOXY Hybrid Mattress sizes have a 300mm profile, so the final bed height will also depend on the base you choose. A tall base can make the bed easier for some people to get in and out of, but it can visually dominate a small room.
For base planning, use the Best Base for a Hybrid Mattress guide. It explains how to think about support, height, airflow and checking the base manufacturer's guidance without making one-size-fits-all compatibility claims.
Plan access before unboxing
The BOXY Hybrid Mattress arrives compressed and roll-packed, which makes it easier to move into the bedroom before unboxing than a rigid mattress of the same size. Move the box into position first, then carefully unbox and unroll the mattress on a supportive base.
Current BOXY support copy says to allow up to 48 hours after unboxing for full expansion. If your delivery address, building access or return question needs confirmation before checkout, contact the BOXY support team before ordering.
How Single and Double fit the wider BOXY range
Single and Double share the same 1880mm length in the current BOXY range. If the room needs a longer mattress, compare Queen or King options in the Australian Mattress Sizes Guide. If the room is mainly about two-person main-bedroom use, the Queen vs King Mattress Room Measurement Guide may be the more useful next step.
For a broader product view, start with the Mattresses collection or the all-sizes BOXY Hybrid Mattress page.
Buying checklist for a small bedroom
- Measure the mattress footprint on the floor before choosing Single or Double.
- Keep the bed path, wardrobe access and drawer clearance usable.
- Choose Single when the room also needs a study, guest or storage function.
- Choose Double when extra sleep width matters and the layout still works.
- Check the base dimensions and height, not only the mattress size.
- Move the boxed mattress to the room before opening it.
FAQs
Is a Single mattress big enough for an adult?
A Single mattress can work for one adult when the room is tight and the user accepts the narrower width. If the room allows more space and the sleeper wants extra width, compare Double.
Is a Double mattress better for a small guest room?
A Double can be better when adult guest sleep space is the priority. A Single can be better when the guest room also works as an office, storage room or everyday multipurpose space.
Are BOXY Single and Double mattresses the same height?
Yes. The current BOXY Single and Double Hybrid Mattress pages both list a 300mm profile. The final bed height depends on the base used with the mattress.
Should I choose by price?
Price can matter, but the better first filter is room fit. A mattress that blocks storage, desk access or walking space can make a small bedroom harder to use every day.