Choosing the right mattress size is just as important as choosing the right mattress feel. A bed that’s too small can disrupt sleep, while one that’s too large can overwhelm your space. With so many options available — from single through to super king — it’s important to understand how each size fits your bedroom, lifestyle, and sleep needs.
This guide breaks down all mattress sizes, explains who each one is best for, and helps you confidently choose the right size for your home.
Why Mattress Size Matters More Than You Think
Your mattress size affects:
- Sleep quality and movement
- Partner disturbance
- Bedroom layout and flow
- Long-term comfort as needs change
The right size gives you enough space to sleep comfortably while still leaving room to move around your bedroom easily.
Single Size Mattress
Best for:
- Children
- Guest rooms
- Small bedrooms
A single size mattress is compact and practical, making it ideal for kids or spare rooms. It’s easy to fit into tight spaces and works well for bunk beds or trundle setups.
Things to consider:
Adults may outgrow a single mattress over time, especially taller sleepers.
King Single Size Mattress
Best for:
- Teenagers
- Taller solo sleepers
- Narrow rooms
A king single size mattress offers extra length compared to a single, making it perfect for growing teens or adults who want more legroom without taking up too much space.
Why it’s popular:
It’s a great in-between size for solo sleepers who want comfort without upgrading to a double.
Double Size Mattress
Best for:
- Solo sleepers who want space
- Small apartments
- Occasional couples
A double size mattress provides more width than a king single and works well in compact bedrooms. It can accommodate two people short-term, but may feel snug for long-term couple use.
Ideal if:
You want more room than a single, but don’t have space for a queen.
Queen Size Mattress
Best for:
- Couples
- Master bedrooms
- Most Australian households
The queen size mattress is the most popular mattress size in Australia — and for good reason. It offers a balance of space and practicality, giving couples room to sleep comfortably without dominating the bedroom.
Why choose a queen:
- Comfortable for two sleepers
- Fits most bedrooms
- Easy to style and accessorise
King Size Mattress
Best for:
- Couples who want extra space
- Light sleepers
- Families with kids or pets
A king size mattress provides generous width, making it ideal if one or both sleepers move during the night. It’s also popular with families who co-sleep with children or pets.
Room size tip:
Make sure your bedroom allows space on both sides of the bed to avoid a cramped feel.
Super King Size Mattress
Best for:
- Large master bedrooms
- Luxury comfort
- Maximum personal space
A super king size mattress offers the ultimate sleeping experience. It’s perfect for couples who want maximum space, minimal disturbance, and a premium feel.
Things to consider:
This size requires a large bedroom and careful planning for delivery access.
How to Choose the Right Mattress Size for Your Bedroom
Before buying, consider these factors:
1. Measure Your Bedroom
Leave at least 60–75 cm of space around the bed for walkways and furniture access.
2. Consider Who’s Sleeping
One sleeper, two sleepers, kids, or pets all change how much space you’ll need.
3. Think Long-Term
If your needs may change, sizing up now can save you replacing your mattress later.
4. Bedroom Functionality
Will your room include bedside tables, wardrobes, or a desk? Factor these into your layout.
Mattress Size Comparison at a Glance
- Single: Compact, great for kids and guests
- King Single: Extra length for teens and adults
- Double: Comfortable solo sleeping, compact couples
- Queen: Most versatile and popular option
- King: Spacious comfort for couples
- Super King: Premium space and luxury sleep
Final Thoughts: Size First, Then Support
Once you’ve chosen the right mattress size, pairing it with a supportive, breathable design is essential for quality sleep. Sleep Republic’s hybrid mattresses are available in every size, offering:
- Zoned pocket spring support
- Cooling, breathable materials
- Reduced partner disturbance
- Convenient mattress-in-a-box delivery
Choosing the right size is the first step toward better sleep — and now you can do it with confidence.
FAQs
What mattress size is best for couples?
A queen is the most popular choice, while king and super king sizes offer more space and less disturbance.
Is a double mattress big enough for two people?
It can work short-term, but many couples prefer a queen or larger for long-term comfort.
What mattress size is best for small bedrooms?
Single, king single, or double mattresses work best in compact spaces.
Should I choose a bigger mattress if I move a lot in my sleep?
Yes. King or super king sizes provide more space and reduce partner disturbance.
