All Australian Mattress Sizes — Dimensions Table
| Size | Width | Length | Best For | Min. Room Size |
|---|---|---|---|---|
| Single | 92cm | 188cm | Children, guest rooms, solo sleepers in small rooms | 2.5m × 3m |
| King Single | 107cm | 203cm | Taller teenagers, single adults who want more width | 2.7m × 3.2m |
| Double | 138cm | 188cm | Couples in small rooms, single sleepers wanting width | 3m × 3.5m |
| Queen ⭐ | 153cm | 203cm | Most couples, single sleepers wanting maximum comfort | 3.2m × 3.7m |
| King | 183cm | 203cm | Couples wanting maximum space, larger builds | 3.7m × 3.7m |
| Super King | 203cm | 203cm | Master bedrooms, couples who want single-bed-each width | 4m × 4m |
Single Mattress (92 × 188cm)
The standard single is Australia's smallest common mattress size and the default for children's beds and single guest rooms. At 92cm wide and 188cm long, it suits sleepers up to around 180cm tall. Above that height, feet will hang over the end — in which case a king single is the appropriate upgrade.
Singles are significantly cheaper than larger sizes across all brands. The Koala Single starts around $500, Ecosa from $399. If you're furnishing a child's room, a king single is worth the modest extra cost — children grow quickly, and the longer length delays the need to upgrade again.
King Single Mattress (107 × 188cm → 203cm)
The king single is 15cm wider than a standard single and 15cm longer — the extra length (203cm) aligning it with the queen and king standard. It's the right choice for taller teenagers and single adults who want more sleeping width without a full double.
A useful detail: king single sheets are interchangeable with queen and king length sheets (all 203cm long). You won't need a separate sheet set if you upgrade from king single to queen later — just the fitted sheet changes.
Double Mattress (138 × 188cm)
The double (sometimes called "full" in American contexts) is 138cm wide — enough for two adults, but only just. Each person has 69cm of width, less than a standard single bed (92cm). For couples who can accommodate a queen in their room, a queen is almost always the better choice for the same or slightly higher cost.
Where doubles make sense: single sleepers who want more width than a single but whose room doesn't accommodate a queen; couples in studios or small-bedroom apartments where a queen simply won't fit; and guest rooms where the room size is the limiting factor.
Queen Mattress (153 × 203cm) — Most Popular
The queen is Australia's most popular mattress size, accounting for the majority of couple mattress purchases. At 153cm wide and 203cm long, it gives each partner 76.5cm of width — less than a single bed (92cm) but comfortable for most couples.
All major Australian brands price their queen competitively — the Koala at $1,050, Emma at $1,149, Sleeping Duck at $1,399. When brands run sales, queens are always the featured size. If you're replacing a queen, you can reuse your existing queen bed frame and all existing queen bedding.
King Mattress (183 × 203cm)
The Australian king at 183 × 203cm gives each partner 91.5cm — essentially the same as a single bed each. For couples where sleep quality is a priority, the 30cm difference over a queen is genuinely significant. The king upgrade is worth it if your bedroom comfortably fits a 183cm-wide frame with movement room around all sides (minimum 3.7m × 3.7m room).
Note: Australian king dimensions (183cm wide) differ from US king (193cm wide). US-standard bed frames and sheets won't fit Australian king mattresses. If you're buying a bed frame from an overseas retailer, verify it's sized for the Australian market.
Super King Mattress (203 × 203cm)
The super king is a square mattress at 203 × 203cm — giving each partner their own single-bed width. It's a luxury size for master bedrooms with the space to accommodate it (minimum 4m × 4m room to allow adequate movement around the frame). Super king availability is more limited than other sizes — not all brands offer it, and it's rarely included in sale pricing.
Australian vs US Mattress Sizes
If you're buying a bed frame or sheets from an overseas retailer or marketplaces that stock US products, the size differences matter:
- Queen: US Queen is 152 × 203cm, Australian Queen is 153 × 203cm — virtually identical, most US queen sheets will fit.
- King: US King is 193 × 203cm, Australian King is 183 × 203cm — a 10cm difference. US king sheets won't fit an Australian king mattress properly.
- Single: US Twin is 99 × 190cm, Australian Single is 92 × 188cm — close but not identical.