Bed Extender

How to Install Your Bed Extender

Our free-standing bed extender is easy to fit.

  • Widening your mattress? Place the extender at the head end for best results. If your headboard gets in the way, simply remove it and mount it to the wall.

  • Adding length? Fit the extender flush against the wall for stability.

No tools, no fuss—just extra comfort, sorted.

Measurements

Measurements

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Product

BUDGET LIGHTWEIGHT FOAM V28

This lightweight foam is a great choice for headboards, crafts, costumes, and a variety of general-purpose projects. It’s easy to work with and perfect for decorative or low impact uses. Just a heads-up: we don’t recommend this grade for seating or any application where it’ll need to support weight regularly.

Grade
V28
Density
28 kg / m3
Properties
Flame Retardant
Not Suitable For Seating

STANDARD MEDIUM SOFT RX30 (WHITE/LILAC)

RX30/110 Lilac Foam SheetA soft, flexible foam ideal for back cushions and headboards. Suitable for soft fixed backs or medium-feel loose back cushions & mattresses .Often chosen when a gentler, more cushioned option is needed. Note: This grade may occasionally be supplied in white, as it is manufactured in both Lilac and White.

Grade
RX30/110
Notional Hardness
110 N
Density
30 kg / m3

PREMIUM MEDIUM FIRM RX39 (ORANGE)

RX39/120 Orange Foam CushionsA popular high-density foam with a soft to medium feel. Ideal for achieving a medium comfort level in thicker cushions or a softer feel in thinner ones. Also works well as a top layer over firmer foam to enhance comfort.

Grade
RX39/120
Notional Hardness
120 N
Density
39 kg / m3

STANDARD FIRM RX33 (BLUE)

Medium density firm foam. Suitable for seating perfect for sofas, dining chairs, boats, caravans, and camper van seating and mattresses. Best choice for cushions 3–4 inches thick. May be too firm for cushions above 5” in thickness  

Grade
RX33
Notional Hardness
200 N
Density
33 kg / m3
Properties
Flame Retardant
Firm, Medium Density Foam

RX39 FIRM / MEMORY FOAM 1" (2.5cm) COMBO

This product is made by laminating RX38 firm blue foam with a 1″ layer of memory foam. It is essential that the total thickness (C) is greater than 1″. If you order this product at exactly 1″ thick, it will consist of memory foam only

Grade
RX39 / Memory Combo
Density
40 kg / m3
Properties
Flame Retardant

RX39 FIRM/ MEMORY FOAM (2") COMBO

This product is made by laminating RX38 firm blue foam with a 2″ layer of memory foam. It is essential that the total thickness (C) is greater than 2″. If you order this product at exactly 2″ thick, it will consist of memory foam only

Grade
RX39 / Memory Combo
Density
40 kg / m3
Properties
Flame Retardant

MEDIUM FIRM REFLEX 40 / MEMORY 1" COMBO

IMPORTANT GRADE INFORMATION This product combines Reflex 40 medium foam with a 1″ layer of memory foam. If you order at 1″ thick, you’ll receive memory foam only — without the Reflex 40 support layer. To ensure proper comfort and support, the total thickness must be greater than 1″.

Grade
Reflex 40
Notional Hardness
135 N
Room Temp. Hardness
135 N
Density
40 kg / m3
Properties
Flame Retardant

MEDIUM FIRM REFLEX 40 / 2" MEMORY COMBO

IMPORTANT GRADE INFORMATION This product combines Reflex 40 medium foam with a 2″ layer of memory foam. If you order at 2″ thick, you’ll receive memory foam only — without the Reflex 40 support layer. To ensure proper comfort and support, the total thickness must be greater than 2″.

Grade
Reflex 40 H / v50
Notional Hardness
135 N
Room Temp. Hardness
135 N
Density
36 kg / m3
Properties
Flame Retardant
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Measurements

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Description

Free-Standing Bed Extender – The Simplest Way to Add Length or Width to Your Bed

If your bed feels too short or narrow, you’re not alone. Most standard UK mattresses measure 190cm to 200cm in length, which simply isn’t long enough for taller sleepers. That’s where our Free-Standing Bed Extender comes in—a smart, simple, and tool-free solution to a frustratingly common problem.

What Is a Bed Extender?

A bed extender (also known as a mattress extension, mattress lengthener, or mattress width expander) is a specially designed piece of high-density foam, covered in breathable, durable fabric, that fits snugly against your existing mattress. It instantly increases either the length or width of your bed, creating a more spacious and comfortable sleeping area—no need to buy a whole new bed.

Why Use a Free-Standing Bed Extender?

Our free-standing bed extension unit is ideal for anyone looking to:

  • Increase mattress length for extra legroom

  • Extend mattress width for a more generous sleeping space

  • Accommodate taller individuals without custom-size mattresses

  • Create a more comfortable sleep setup in guest rooms, holiday lets, or campervans

Unlike permanent alterations or custom frames, this mattress extension piece is:

  • Fully portable

  • Requires no tools or installation

  • Works with any mattress type including memory foam, hybrid, or sprung

  • Covered in a premium, breathable fabric like TENCEL™ for maximum comfort

How to Install Your Mattress Extender

Fitting the bed extender takes seconds:

  • For mattress lengthening: Simply place the extender at the head of your bed,  pushed against the wall for added support. If your headboard gets in the way, you can remove it and re-mount it to the wall behind.

  • For mattress widening: Fit the extender flush with a the wall  or Contact us and we can make a customer cover that fits over the whole mattress including the extender (extra charges will apply)

Key Features and Benefits

  • Compatible with all standard UK mattress sizes (Single, Double, King, Super King)
  • Supportive yet comfortable high-resilience foam

  • Helps reduce foot overhang and improve sleep posture

  • No tools, no screws, no stress—just place and use

Who Is This For?

  • Tall individuals (over 6ft)

  • Couples who want more elbow room

  • Parents co-sleeping with children

  • Anyone with a bed frame they’re not ready to replace


This is the most straightforward, cost-effective solution for extending a bed in the UK.
Forget expensive custom orders—this freestanding mattress extension gives you all the comfort you need without the hassle or high price tag.