If you’re shopping for double beds for sale in Johannesburg, choosing the right mattress is just as important as choosing the bed itself.
One of the most common questions is:
What size mattress fits a double bed?Â
The answer is simple — but there are a few important details to get right.
Standard Double Bed Mattress Size
A standard double bed mattress in South Africa measures:
- Width: 137 cm
- Length: 188 cm
This matches the size of a standard double bed base.
If you want a full breakdown, see our double bed dimensions guide.
Why Size Accuracy Matters
Getting the correct mattress size is essential.
If the mattress is too small:
- It will shift or move
- Leaves gaps around the edges
- Reduces comfort and support
If the mattress is too big:
- It won’t fit the base properly
- Can damage the mattress or frame
- Creates an uneven sleeping surface
Always ensure your mattress matches the exact double bed dimensions.
Types of Mattresses That Fit a Double Bed
Once you’ve got the size right, the next step is choosing the type.
1. Innerspring Mattress
- Most common option
- Good support and durability
- More affordable
Ideal for budget-conscious buyers
2. Memory Foam Mattress
- Moulds to your body
- Reduces pressure points
- Good for comfort
Great for couples or side sleepers
3. Hybrid Mattress
- Combines foam + springs
- Balanced comfort and support
A good mid-range option
Choosing the Right Mattress for Your Needs
The best mattress depends on how you use your double bed.
For couples:
- Medium to firm support
- Motion isolation (foam or hybrid)
You may also want to read: Is a double bed big enough for two adults?
For small rooms:
- Lighter mattresses are easier to move
- Compact designs work better
See: Is a double bed good for small rooms?
For budget buyers:
- Innerspring mattresses offer best value
See our double bed price guide in Johannesburg for pricing insights.
Double Bed vs Other Mattress Sizes
Make sure you’re not confusing sizes:
- Single mattress → too small
- Three-quarter mattress → won’t fit properly
- Queen mattress → too large
Only a standard double mattress fits correctly.
Common Mistakes to Avoid
- Buying the wrong size mattress
- Ignoring bed base compatibility
- Choosing price over comfort
- Not considering sleeping habits
Final Verdict
So, what mattress fits a double bed?
A standard double mattress (137 cm x 188 cm) is the correct and only proper fit.
From there, your choice depends on:
- Budget
- Comfort preference
- Sleeping style
Ready to Find the Right Double Bed?
Browse our range of affordable double beds for sale in Johannesburg and choose a bed and mattress combination that suits your needs perfectly.