Understanding Adjustable Bed Sizes: A Buyer’s Guide (UK)
This blog was inspired by a list of customer queries on what sizes of adjustable (electric) beds we offer and how to choose the right size for you.
The right size ensures comfort, space efficiency and optimal use of the adjustable mechanism. In this guide, we’ll explain the adjustable bed sizes available, the benefits of adjustable beds, and how to choose a size and model that suits your needs.
Why choose an adjustable bed?
Before diving into sizes, it’s worth recapping why many people choose adjustable beds over standard bases and bed frames:
-
Custom sleeping positions: You can elevate your head, feet, or both, to ease pressure on joints, back, hips or shoulders.
-
Health benefits: Adjustable beds may help reduce snoring, ease acid reflux (by elevating the head), improve circulation (by elevating the legs), reduce swelling in ankles/feet, and relieve back pain or arthritic discomfort. More on health benefits>>>
-
Flexible use beyond sleep: Great for reading, watching TV, or simply relaxing in a reclined position without propping pillows.
-
Couples’ comfort: With dual motors and independent mattress tensions (dual-tension), each partner can find their ideal position without disturbing the other.
-
Modern aesthetics and added features: Many adjustable beds now come with sleek designs, massage units, under-bed lighting, storage drawers, safety rails, etc.
The next step is picking the right size >>>
Adjustable Bed Sizes (UK / Imperial & Metric)
| Bed Size | Dimensions (cm) | Imperial equivalent | Best for / comments |
|---|---|---|---|
| Small Single | 75 × 200 cm | 2 ft 6 in × 6 ft 6 in | Narrow spaces, guest room, or for people with minimal width needs. |
| Single | 90 × 200 cm | 3 ft × 6 ft 6 in | Standard single size — comfortable for most solo sleepers. |
| Large Single | 105 × 200 cm | 3 ft 6 in × 6 ft 6 in | Offers more width without going to a full double. |
| Small Double | 120 × 200 cm | 4 ft × 6 ft 6 in | A good option when space is limited but more width is desired. |
| Double | 135 × 200 cm | 4 ft 6 in × 6 ft 6 in | Classic double — luxury for a solo sleeper. Couples may prefer a king/superking. |
| King Size | 2 × 75 × 200 cm (linked) | 2 × (2 ft 6 in × 6 ft 6 in) | Twin motor halves linked or separate — ideal for couples wanting flexibility. |
| Super King Size | 2 × 90 × 200 cm (linked) | 2 × (3 ft × 6 ft 6 in) | Extra width for couples; allows independence of adjustment for each side. |
A few important notes:
-
Linked beds for couples: King and super king adjustable beds typically come as twin bases (each side adjustable), which can be linked to form one large bed or used independently.
-
Dual tension option: For couples with different firmness preferences, dual-tension adjustable beds let each person choose their preferred mattress firmness.
-
Room & space measurement: Always measure your room, leaving clearance for the bed’s movement, bedside access, and furniture.
-
Length: The standard 200 cm (6 ft 6 in) length is typical..
-
Weight limits and mechanisms: The mechanisms are designed for robust use (some support up to 25 stone).
Below is the Mlily Gel Profile Ortho Pocket 1000 Electric Adjustable Bed. This model is comprised of one base unit rather than 2 separate bases.
This unit features lumber adjusters in the lower back section, allowing you to increase or decrease the firmness in that area.
Sizes available for a singular unit base -
- 2ft 6 small single
- 3ft single
- 4ft small double
- 5ft king size
- 6ft super king size
Key Features to Look For (beyond size)
-
Remote handset (wired or wireless) for easy adjustment.
-
5-way hinged mechanism: Allows precise movement and angle control across different parts of the bed (head, feet, middle).
-
Lumbar adjusters: Lets you fine-tune support in the lower back.
-
Accessories: massage function, safety rails, storage drawers, and floor lights.
-
Mattress compatibility: Use a mattress designed to bend with adjustable beds.
Also check:
-
Warranty/guarantees.
-
Weight capacity (reinforced bases available).
-
Whether you are eligible for VAT relief.
Recommended Adjustable Beds
From £1,468.35VAT exempt SAVE £731.64
From £1,090.83VAT exempt SAVE £389.17
From £603.91VAT exempt SAVE £306.08
Final Thoughts & Checklist for Buyers
When considering an adjustable bed, let your comfort and needs guide your size. Use this checklist:
-
Measure your room (allow for clearance, movement, and bedside furniture).
-
Decide usage (solo, couple, health support).
-
Pick base width (Single, Large Single, Small Double, Double, King, Super King) based on space and comfort.
-
Select a mattress compatible with adjustability (pocket spring, reflex foam, memory foam).
-
Consider dual tension if you or your partner have different firmness needs.
-
Check warranty, service, accessories (massage, rails, storage, etc.).
-
Investigate VAT exemption if buying for a qualifying medical condition.
Once you've narrowed your options, test the feel in one of our showrooms, and review motor noise, stability, and adjustment smoothness. The right adjustable bed shouldn’t just look good on paper — it should provide restful, customised support night after night.