A king single bed with trundle is a space-saving bed design that features a standard Australian king single bed (107 cm wide x 203 cm long) with a secondary pull-out bed stored underneath. The trundle bed is typically the same length as the main bed and is designed for occasional or regular use, making it ideal for guest sleepovers, siblings or flexible living spaces.
In simple terms, it’s one bed that sleeps two—without permanently taking up extra floor space.
Here’s why Australians love this setup: it delivers adult-length comfort, maximises room functionality and keeps bedrooms looking uncluttered.
Understanding dimensions is essential for room planning.
Width: 107 cm
Length: 203 cm
Width: 90–107 cm (varies by design)
Length: 190–203 cm
Mattress height: Usually slimmer (15–20 cm) to allow clearance
Slightly wider and taller than a standard king single frame
Requires clearance space in front or to the side for trundle extension
The main reason dimensions matter is ensuring the trundle can fully extend without hitting walls, desks or wardrobes.
A king single bed with trundle is designed for ease of use.
The trundle bed sits on low-profile wheels or castors
It slides smoothly from under the main bed
Some trundles sit at floor level
Others pop up to match the height of the main mattress
In simple terms, you get a hidden second bed that’s ready whenever you need it.
There are several variations available in Australia, each suited to different needs.
A simple second mattress that rolls out from underneath. Best for occasional guests.
Raises to the same height as the main bed, creating a near-equal sleeping surface.
Combines a trundle bed with drawers or shelves for added functionality.
Durable, classic designs ideal for family homes.
Adds a softer, more refined look suited to teen or guest bedrooms.
The main reason to choose carefully is how often the trundle will be used.
Here’s a practical buyer’s guide to help you select the right option.
Ensure there’s at least 200–220 cm of clearance where the trundle will extend.
Trundle mattresses are usually thinner—confirm maximum height allowances.
Frequent use may benefit from a pop-up trundle for added comfort.
Some designs offer drawers in addition to the trundle.
Choose finishes that work from childhood through to adulthood.
In simple terms, plan for both everyday use and future needs.
This bed type is popular across Australian homes for good reason.
Sleeps two without taking extra space
Adult-length comfort for taller sleepers
Ideal for shared or multifunctional rooms
Keeps guest beds hidden when not in use
Excellent long-term value for families
Children’s bedrooms
Teen rooms
Guest rooms
Holiday homes
Apartments and townhouses
The main reason Australians choose a king single bed with trundle is flexibility—it adapts to changing needs effortlessly.
Interior designers recommend the following minimum room dimensions:
Minimum room width: 260–280 cm
Minimum room length: 320–340 cm
This allows space for:
Trundle extension
Walkways
Bedside tables or desks
In simple terms, a king single trundle bed works best where thoughtful layout planning is possible.
Bedding requirements differ slightly between the main bed and the trundle.
King single fitted sheets (107 cm x 203 cm)
King single doona cover
Single or king single sheets (check exact trundle size)
Slim-profile mattress protectors
Using correct bedding ensures comfort and prevents excess fabric bunching.
At House of Isabella Australia, king single beds with trundle are curated to suit Australian family homes and modern living. Each design clearly lists mattress compatibility and dimensions in centimetres to simplify planning.
Why Australians choose House of Isabella:
Buy Now, Pay Later with Afterpay & Zip
Fast delivery Australia-wide
East & West Coast warehouses
Large in-stock catalogue
Exclusive, design-led furniture
Australian-based customer care
Design influences inspired by collections such as Florabelle Collection, Gallery Home and Café Lighting & Living ensure trundle beds feel stylish—not purely practical.
In 2025, trundle beds are evolving with modern lifestyles.
Pop-up designs that feel like permanent beds.
White, oak, soft grey and upholstered tones dominate.
Beds designed to support sleep, storage and study zones.
Less “kids-only” styling, more transitional aesthetics.
The main reason these trends matter is that families want furniture that grows with their homes.
Good styling ensures the bed doesn’t feel bulky.
Use streamlined bedside tables
Keep under-bed clearance visible when trundle is stored
Choose light-coloured bedding in smaller rooms
Add vertical shelving to save floor space
Use a rug sized wider than the main bed
In simple terms, smart styling keeps the room balanced and functional.
What size is a king single bed with trundle in Australia?
The main bed fits a 107 cm x 203 cm mattress.
Is the trundle suitable for adults?
Yes, especially pop-up trundle designs with quality mattresses.
Do trundle mattresses need to be thinner?
Usually yes, to allow clearance under the main bed.
Can both beds be used daily?
Yes, with supportive frames and suitable mattresses.
King single bed
Trundle bed
King single mattress
Storage bed
Bed sizes Australia
Mentions of brands such as Florabelle Collection, Gallery Home, Café Lighting & Living, Zaffero, Emac & Lawton and others are included purely for descriptive and contextual purposes. House of Isabella Australia is not affiliated with, endorsed by, or associated with these brands.
Disclaimer: All trademarks, brand names and product names mentioned on this website are the property of their respective owners. Any references are made for identification, informational or comparative purposes only, and do not imply any affiliation, endorsement, sponsorship or authorisation.
My Cart
Your Cart Is Empty
Continue shopping
