Small Double Mattresses (4ft)

Flash Sale

Delivered in 14 Days

Trustpilot

Bi-seasonal Memory Foam Sprung Mattress

Soft Memory Foam Depth 16-20cm

In stock

As low as £125.00

div class="ssb-small-double-mattresses-4ft-content" style="font-family:'Segoe UI',Tahoma,Verdana,sans-serif;color:#2c3e50;line-height:1.75;max-width:100%;overflow-wrap:break-word;">

Small Double Mattresses - 4ft UK Size 120cm x 190cm

A small double mattress is the standard UK 4ft mattress size: 120cm x 190cm. Search terms such as small double mattress, 4ft mattress, small double mattress size and mattress for small double bed usually refer to this same size.

At SoSoftBeds, compare 4ft mattresses by comfort feel, construction and support type, including memory foam, pocket sprung and hybrid options. Check the product details for mattress depth, firmness and bed-base suitability before ordering.

Standard 4ft size
Small double mattress dimensions: 120cm x 190cm.

Compact room fit
Wider than a single while staying smaller than a double.

Compare by comfort
Choose the support and feel that suits your sleeping preference.

Is a 4ft mattress the same as a small double mattress?

Yes. In the UK, a small double mattress is commonly called a 4ft mattress and normally measures 120cm x 190cm. It gives one sleeper more width than a single mattress and can also suit guest rooms where a standard double would take too much floor space.

Before you buy a small double mattress

Confirm your bed frame or base is UK small double size, 120cm x 190cm.
Check mattress depth against fitted sheets, headboard height and frame style.
Compare comfort feel, support type and mattress construction before ordering.
If using an ottoman bed, check mattress depth and weight against the product guidance.

Small double mattress dimensions

The standard UK small double mattress size is 120cm x 190cm. It is the same length as a single or double mattress, but it is 30cm wider than a single and 15cm narrower than a double.

Specification	Small double mattress guide	Why it matters
UK mattress size	Small double / 4ft	Best for compact rooms and guest bedrooms.
Mattress dimensions	120cm x 190cm	Matches UK small double beds and 4ft frames.
Width comparison	30cm wider than a single, 15cm narrower than a double	Useful when a single feels too narrow but a double is too large.
Bed compatibility	Small double beds, small double ottoman beds and 4ft bases	Always match the mattress to the exact frame size.

Shop related categories

Small double beds
Compare all 4ft bed styles and frame options. Small double ottoman beds
4ft beds with lift-up hidden storage. Storage beds
Browse storage beds by size and style. Single mattresses
Compare the narrower 3ft mattress size. Double mattresses
Move up to the standard 4ft6 double size. Headboards
Finish your bed with a matching upholstered style.

Small double mattress questions answered

What size is a small double mattress?

A UK small double mattress is 120cm x 190cm. It is also known as a 4ft mattress.

Is a small double mattress good for adults?

A small double mattress can be a good choice for one adult who wants more width than a single mattress. For two regular sleepers, a standard double or larger size may be more comfortable.

Will a small double mattress fit a 4ft bed?

Yes, provided the bed frame is a UK small double or 4ft frame. Check the product dimensions before ordering because finished frames can be wider or longer than the mattress.

What type of small double mattress should I choose?

Choose by comfort preference, support type and bed-base compatibility. Memory foam can offer contouring comfort, pocket sprung options give individual spring support, and hybrid designs combine more than one comfort layer. Check each product specification before buying.

Shop small double mattresses at SoSoftBeds and choose the right 4ft, 120cm x 190cm mattress for your bed and comfort preference.