Last updated: 25 September 2026 (Australia/Sydney) · Written and reviewed by the Darrah Opens team, Australian home & outdoor specialists.
Quick answer: An Australian queen mattress is 153 × 203 cm and a king is 183 × 203 cm, so a king adds 30 cm of width at the same length. Choose queen for rooms under about 3.3 m wide or for most couples; choose king if you want more shoulder room and still have 60 cm walkways on both sides.
In Australia, a queen mattress is commonly 153 × 203 cm and a king is commonly 183 × 203 cm. Length matches; king adds about 30 cm of width. Choose queen when the room and bed frame are standard couple size; choose king when you want extra shoulder room and have confirmed walkway clearance. Always read the exact centimetres on the Darrah Opens product page — thickness (height) is separate from the size name.
Browse live stock: Furniture → Mattresses.
Australian size cheat sheet
Confirm cm on each listing before you order:
| AU size name | Common mattress footprint | Notes |
|---|---|---|
| Single | Check listing (often ~92 × 188 cm class) | Kids, guests, bunks |
| King single | Check listing | Taller singles / teen beds |
| Double | e.g. Giselle Cool Gel Foam 30 cm Double lists 137 × 190 × 30 cm | Couples in small rooms sometimes use double |
| Queen | Commonly 153 × 203 cm | Default couple size in many AU homes |
| King | Commonly 183 × 203 cm | Extra width; same common length as queen |
| Super king | Listed separately where offered | Confirm cm — do not assume overseas “California king” |
Overseas US/UK names do not map cleanly. Buy by Australian size name + cm, not by a holiday mattress memory.
Queen vs king — how to decide
Choose queen if
- The bedroom is compact and you need walkways beside the bed
- Your existing frame, sheets and protectors are already queen
- You want the widest choice of models in the catalogue (queen is heavily stocked across Giselle and EasyDreamer lines)
Examples in the mattress collection include Giselle Mattress Cool Gel Foam 30cm Queen, Giselle Bedding Memory Foam Mattress Bed Cool Gel Non Spring 15cm Queen, EasyDreamer Orthopaedic Euro Top Pocket Spring Queen Mattress, and firmer Giselle pocket-spring queens.
Choose king if
- Two adults want more width for hotter sleepers or different schedules
- The room easily fits ~183 cm width plus bedside tables
- You are buying frame and mattress together in king (for example Artiss king bed frames listed alongside mattresses on Darrah Opens)
King examples include Giselle Mattress Cool Gel Foam 30cm King, EasyDreamer orthopaedic Euro top pocket-spring king listings (confirm cm on the product page), and Giselle extra-firm / pocket-spring king listings.
Room-fit measuring tips (Australia)
- Measure wall-to-wall where the bed will sit
- Subtract wardrobe doors, heater clearances and door swing
- Leave sensible walkways (many people aim for enough space to walk sideways to a bedside table)
- Measure the existing base or frame inner dimensions if reusing one
- Check mattress thickness against bedhead, under-bed drawers and any adjustable base limits
Thickness on Darrah Opens spans slim tight-tops (around 13 cm Giselle Bonnell/tight-top styles) through 15 cm cool-gel foams, 30 cm cool-gel and EasyDreamer Euro tops, and taller pocket-spring / Euro-top models (including 32–35 cm class Giselle listings). A queen can be short or tall — height is not the size name.
Firmness and construction (still check the page)
Size choice does not set firmness. On Darrah Opens you will see labels such as:
- Medium firm (e.g. firmness 6.5 on some Giselle Cool Gel / Tiberius-style listings)
- Extra firm / super firm pocket-spring Giselle lines
- EasyDreamer orthopaedic Euro top pocket-spring models across single through king
Partner disturbance, edge support and cooling features vary by series — cool gel foams are discussed in more detail in our summer sleep guide. For size alone, match cm + frame.
Mattress-in-a-box expand notes
Many Giselle mattresses ship vacuum-packed. Listings often note expansion within 1 day (wording varies — some say up to 48 hours). Lay flat on the base, cut packaging carefully, and wait for full loft before judging firmness or fit under a bedhead.
Sheets, protectors and frames
- AU queen and king sheet sets are not interchangeable
- If you size-up to king, budget new protectors and fitted sheets
- Pairing with an Artiss bed frame? Match the frame’s size name (Double / Queen / King) to the mattress size name and confirm load capacity on the frame listing
Who queen vs king is for
Australian couples choosing main-bedroom footprint. Same common 203 cm length on Giselle Cool Gel examples; king adds width (183 cm vs 153 cm). Measure the room and bedside clearance first.
Soft catalogue note
If a Cool Gel double product endpoint 404s, keep the draft link and confirm centimetres on the live storefront — do not invent alternate dimensions.
Room-fit table for Australian bedrooms (cm)
Use these as starting points, then confirm exact dimensions on the product page and your bed frame.
| Size (AU) | Mattress (cm) | Comfortable room width* |
|---|---|---|
| Double | 138 × 188 | about 2.6 m+ |
| Queen | 153 × 203 | about 2.8–3.0 m+ |
| King | 183 × 203 | about 3.1–3.3 m+ |
*Allows roughly 60 cm walkways each side plus bedside tables; a bed frame adds width and length.
Measure before you choose
- Mark the frame footprint (not just the mattress) with painter's tape.
- Check wardrobe and door swing clearance at the foot end.
Bedding costs follow the size
A king also means king sheets, protectors and quilt covers; factor that in if you are replacing everything at once.
Frequently asked questions (2026)
What size is an Australian queen mattress in cm?
Commonly 153 × 203 cm. Confirm on the exact product page.
What size is an Australian king mattress in cm?
Commonly 183 × 203 cm. Confirm on the exact product page.
Is Australian king the same as US king?
Not reliably. Always buy by AU labelling and centimetres on Darrah Opens.
Queen or king for a couple?
Queen is the usual starting point; king adds width. Measure the room and frame first.
Does a thicker mattress change the size name?
No. Thickness is height. A 13 cm queen and a 30 cm queen share the same footprint class if both are true AU queens — verify cm.
Where is the double size useful?
Smaller rooms and some guest spaces. Example dimensions appear on listings such as the Giselle Cool Gel Foam 30 cm Double (137 × 190 × 30 cm on that page).
Where do I compare queen and king side by side?
Furniture → Mattresses — open Giselle and EasyDreamer product pages for exact cm, thickness and firmness.
Do US queen/king sizes match Australia?
Not reliably. Buy by Australian size name plus centimetres on the Darrah Opens product page.
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Will a queen mattress fit a king bed frame?
No. A king frame is about 30 cm wider, so a queen mattress will slide and leave a gap. Match the mattress size name to the frame size, and check the frame's internal dimensions on its product page.
What is the difference between a king and a super king in Australia?
A standard Australian king is 183 × 203 cm. Super king is not a universal Australian standard and varies by brand, so always compare the centimetres listed on the product page rather than the name.
Related Darrah Opens guides
- Australian Mattress Size Chart: Single to King in Centimetres
- How Thick Should an Australian Mattress Be? 13 cm vs 15 cm vs 30 cm
- Mattress-in-a-Box Unboxing in Australia: Expand Time, Odour and First Night Tips
- Artiss Bed Frame Size Guide: Double, Queen and King Load Ratings Explained
- King Single Mattress Guide for Aussie Kids’ Rooms and Guest Beds