Small Double Mattresses (4ft)

Why choose a small double mattress?

The small double is the "Goldilocks" of the mattress world—larger than a single mattress but more compact than a standard double. It solves several common bedroom dilemmas:

• The teenager’s choice: As children grow, they often outgrow single beds. A 4ft mattress provides that extra "roll-over" room without dominating a smaller bedroom.

• A great guest room option: A small double is widely considered the best choice for guest rooms. It accommodates two adults for short stays while leaving enough floor space for wardrobes and bedside tables.

• Solo sleepers who like space: If you sleep alone but enjoy stretching out, a 4ft mattress offers a luxury feel without the footprint of a larger bed.

Expert Advice: What type of 4ft double mattress do I need?

At MattressNextDay, we don't just sell beds: we want to help you find the perfect sleep solution for your needs. Because small doubles are often used in guest rooms or for growing teens, versatility is key. Here is what we recommend based on the primary sleeper:

• Pocket Sprung Small Doubles: Best for guest rooms where sleepers have different weights and positions. The individual springs prevent "roll-together," maximising the 120cm width.

• Memory Foam Small Doubles: Ideal for teenagers or solo sleepers who want a fully cushioned feel and unbeatable pressure relief for growing or aching joints.

• Hybrid Small Doubles: Perfect for those who want the cooling, responsive bounce of springs combined with a modern, cushioned top layer of foam or gel.

For more in-depth guidance on choosing the best type of small double mattress, read our guide on Pocket Sprung vs Memory Foam vs Hybrid mattresses.

Why shop from MattressNextDay?

Since 2003, we have been at the forefront of the UK bedding industry. When you buy a mattress from us, you are choosing a retailer with a proven track record of quality, reliability, and exceptional customer service:

• 3x NBF Online Retailer of the Year: An industry-verified seal of approval for safety, sustainability, and ethics.
• Which? Best Buy Selection: We stock mattresses rigorously tested by independent experts, ensuring long-term durability.
• 31,000+ Trustpilot Reviews: Rated "Excellent" by our customers.
• Sustainable Sleep: Select our Old Mattress Removal service at checkout, and we will responsibly recycle your old bed.

Small Double Mattress FAQs

What are the dimensions of a small double mattress?

A standard UK small double mattress is 4ft wide and 6ft 3" long (120 x 190cm). This makes it 15cm (6 inches) narrower than a standard double. For a full breakdown, see our Ultimate UK Bed and Mattress Size Guide.

Can two adults sleep on a small double?

Yes, a 4ft mattress can accommodate two adults. It is a "snug" fit, providing 60cm of space per person, so it is often better suited for couples who don't mind sleeping close or for occasional guest use. If you are a couple using this as your primary everyday bed, we highly recommend a pocket sprung model with reinforced edge support to maximise the usable surface area.

Will my current bed frame work?

If you have an existing 4ft Small Double frame in good condition, it will work perfectly.

Expert Tip: Check your slats! To protect your mattress warranty and ensure consistent support, the gaps between your bed slats should not exceed 7cm. If your frame is worn out, explore our range of Small Double Bed Frames or space-saving Small Double Divans.

Is a small double the same as a Queen size?

In the UK, the terms are often used interchangeably; a "Queen" is technically a Small Double (120cm wide). However, in the USA, a Queen is much larger (152cm wide, similar to a UK King Size). Always check the cm measurements (120 x 190cm) before buying your Small Double Bedding or Mattress Protectors to ensure a perfect fit.