Single VS Small Double Mattress: What’s the Real Fit?

When it comes to choosing the right mattress size, many people find themselves stuck between a single mattress and a small double. Both are popular choices in UK households, especially for teens, young adults, and guest rooms. But the decision depends on more than just room size, it’s about comfort, budget, and long-term usability. Understanding the differences between the two can help you find the best fit for your lifestyle.

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Mattress Dimensions Explained

Before comparing, it’s important to know the exact sizes.

• Single mattress: 90cm x 190cm (3ft x 6ft3)

• Small double mattress: 120cm x 190cm (4ft x 6ft3)

Both sizes have the same length, but the small double is 30cm wider, providing noticeably more sleeping space.

Pros of a Single Mattress

The single mattress remains one of the most popular choices in the UK for a reason.

• Space-saving: Fits easily in smaller bedrooms or box rooms.

• Cost-effective: Typically cheaper than larger sizes.

• Ideal for children and teens: Provides enough space for growing bodies without overwhelming the room.

• Flexible placement: Easier to move, position, or repurpose as a guest bed.

For compact living environments, single mattresses strike the right balance between comfort and practicality.

Cons of a Single Mattress

While practical, a single mattress has limitations:

• Limited sleeping space: Not suitable for adults who move a lot in their sleep.

• No room for couples: Strictly designed for one person.

• Shorter lifespan of use: Teenagers often outgrow singles by late adolescence.

Pros of a Small Double Mattress

Small doubles — also called three-quarter beds — are gaining popularity among young adults and in modern homes.

• Extra width: Provides 30cm more space, making it more comfortable for restless sleepers.

• Couple-friendly (short-term): Can fit two people for occasional sharing, though not ideal long-term.

• Versatile use: Perfect for guest rooms, studio flats, or multi-purpose bedrooms.

• Stylish appeal: Offers a middle ground between single and double without overwhelming small rooms.

Cons of a Small Double Mattress

Despite the benefits, small doubles have drawbacks too.

• More expensive: Costs more than singles in both mattress and bedding.

• Tighter fit for couples: Not spacious enough for two adults on a daily basis.

• Takes up more floor space: May make compact bedrooms feel cramped.

Who Should Choose a Single Mattress?

A single mattress is best suited for:

• Children and early teens who don’t need extra width yet.

• Students living in dorms or small rented rooms.

• Spare bedrooms where space is limited.

• Budget-conscious buyers who want a simple, affordable sleep solution.

Who Should Choose a Small Double Mattress?

A small double is the better choice for:

• Older teens or young adults who want more space without upgrading to a full double.

• Guest rooms where couples may occasionally stay.

• Compact flats where saving space is important but comfort can’t be compromised.

• Solo sleepers who sprawl or toss and turn during the night.

Comfort and Sleeping Style Considerations

Your sleeping style plays a role in deciding between single and small double mattresses.

• Side sleepers: Often benefit from more width, making a small double more suitable.

• Back and stomach sleepers: Can comfortably use a single mattress, especially if they don’t move much.

• Combination sleepers: May prefer the extra space of a small double for freedom of movement.

Cost and Bedding Differences

Aside from the mattress itself, remember the cost of bed frames, sheets, and duvets. Small doubles require specially sized bedding, which may not be as widely available as single sets. Singles are more affordable and easier to accessorize.

Room Size and Layout

The size of your bedroom is a deciding factor. A single mattress leaves more room for storage, desks, or wardrobes, while a small double provides more comfort but requires careful layout planning. In a compact bedroom, a small double can make the space feel crowded unless paired with clever storage solutions like under-bed drawers or wall-mounted shelves.

Conclusion

The choice between a single and small double mattress ultimately depends on your needs. A single mattress is cost-effective, space-saving, and ideal for children, teens, or small rooms. A small double mattress offers more width and versatility, making it great for young adults, guest rooms, or solo sleepers who want extra space. By weighing your sleeping style, room size, and budget, you can make a confident decision that ensures both comfort and practicality.