Square & Rectangular Cushion Covers

Boxed & Piped Cushion with Foam & Dacron
Boxed & Piped Cushion with Foam & Dacron

How to Order a Replacement Square Cushion Cover (Made Easy)

Pick Your Units – Choose whether you’re measuring in millimetres (mm), centimetres (cm), or inches (“).
Enter Your Cushion Sizes – Type in the length, width, and depth of your cushion.
Need a New Inner? – Choose if you want us to supply a cushion interior or just the cover.
Add Extras (Optional) – Add Stockinette or Dacron wrap to make the cushion plumper and easier to fit.
Design Your Cover – Pick your cover style and answer a few quick questions.
Add Any Notes – Let us know anything extra (e.g. zip position, which side is the front).
Add to Cart – Once you’re happy, click Add to Cart.

Now Choose Your Fabric

Once your cover design is in the cart, you’re ready to choose your fabric.

Measurements

Measurements

Reference Image

choose your cushion filling

COVER ONLY (NO FOAM)

Use this option to create a cover to the sizes entered above

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 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

STANDARD MEDIUM FIRM MATTRESS FOAM RX36/125

Medium-density foam ideal for mattresses 4″ and above. It provides balanced support and comfort, making it a great choice for those seeking a medium-firm sleeping surface. Keep in mind—thicker mattresses offer more support than thinner ones, regardless of foam grade.

Grade
RX36/125
Notional Hardness
125 N
Room Temp. Hardness
125 N
Density
36 kg / m3
Properties
Comfort level: MEDIUM FIRM for mattresses above 4" (`10cm ) in thickness
Density: MEDIUM

PREMIUM HIGH FIRM RX39 (BLUE)

Most popular High 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
RX39/200
Density
39 kg / m3
Properties
Flame Retardant
Highly Recommended Firm Seating & Mattress Foam

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

PREMIUM MEDIUM FIRM REFLEX 40H (GREY)

High density, medium firm foam Reflex 40h is a high-quality foam known for lasting comfort and support. It bounces back quickly and keeps its shape for years—perfect for sofa cushions, armchairs, or even as a mattress.

Grade
REFLEX 40 H
Notional Hardness
150 N
Density
40 kg / m3
Properties
Flame Retardant
Highly Recommended, High Density, Medium Firm, Seating & Mattress Foam

VASCO 50 MEMORY FOAM (WHITE/ YELLOW)

High-quality UK-made, heat-sensitive foam that softens and moulds to your body, offering pressure-relieving comfort. Commonly used in mattresses, toppers, pillows, wheelchair cushions, and medical products.

Grade
VASCO 50
Notional Hardness
65 N
Density
50 kg / m3
Properties
Flame Retardant

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

30PPI RETICULATED FOAM

A durable, open-cell foam that resists water, humidity, and chemicals — ideal for outdoor seating and air/water filtration. Its breathable structure also makes it great for humidifiers, ventilation, and industrial filtration systems.

Properties
Not Fire Retardant (None F/R)
Perfect for Outdoor Seating

SUPERIOR HIGH DENSITY FIRM RG50 (WHITE)

High density firm foam RG50 is a high-density, firm foam ideal for heavy-duty support. It’s commonly used in seat cushions, gym mats, and other applications where durability and strong support are key. This is the perfect foam for thin Pop-top or Roof-Tent mattresses.

Grade
RG50/230
Notional Hardness
230 N
Density
50 kg / m3
Properties
Flame Retardant

SUPERIOR HIGH DENSITY MEDIUM FIRM REFLEX 50 (PINK)

Luxury Relex 50  is a high-density, medium firm foam designed for superior support and durability. Ideal for premium seating and high-quality mattresses, this foam is perfect for deep-fill cushions and applications where long-lasting structure and resilience really matter. It holds its shape beautifully, delivering both comfort and strength over time.

Grade
REFLEX 50
Notional Hardness
135 N
Density
50 kg / m3
Properties
Flame Retardant

FIBRE FOR BACKS, BOLSTERS & PILLOWS

Grade
100% Hollow Fiber

FIBRE FOR SEATS CUSHIONS

FOAM CORE FEATHER (MEDIUM FIRM)

High density, medium firm foam Reflex 40h is a high-quality foam known for lasting comfort and support. Bounces back quickly and keeps its shape for years—perfect for as the core for a feather or fibre seat interior    

Grade
REFLEX 40
Notional Hardness
135 N
Room Temp. Hardness
135 N
Density
40 kg / m3

FOAM CORE FIBRE INTERIOR

This Foam core feather combination is best suited to those wanting a medium form seat  

Grade
REFLEX 40 H
Notional Hardness
135 N
Room Temp. Hardness
135 N
Density
40 kg / m3

EUROPEAN 302 DE-QUILLED FEATHER

European 302 de -quilled for extra comfort

    Before you order fabric Please send your design to the basket then order fabric 

Your Created Product

Measurements

choose your cushion filling

FROM £7.50

Description

Custom-Made Square & Rectangular Cushion Covers – Tailored for Every Space, Built to Last

Looking to refresh tired cushions or upgrade your seating with something that fits just right? Our Custom Rectangular and Square Cushion Covers are a smart, stylish solution for every setting — whether it’s the family sofa, a campervan bunk, a window seat, or the corner of your boat cabin.


Versatile Cushion Covers, Designed to Fit Your Life

No matter where you use them — at home, on the road, or on the water — these custom cushion covers are made to your exact dimensions. The result? A crisp, professional fit that avoids sagging, bunching, or fiddling. You simply measure, and we do the rest.


Made to Your Spec, in Your Style

To help you get exactly what you want, we offer a variety of styles to suit any space:

  • Wrap Style – clean and modern, with or without a piped edge

  • Box Style – sharp, structured edges for a neat and tailored finish

  • Box with Piping – a classic touch that enhances the overall look

  • Box Pleat Style – traditional elegance with added detail

Each cover is individually cut and stitched by skilled hands — no off-the-shelf shortcuts here.


Custom-Made Square & Rectangular Cushion Covers – Tailored for Every Space, Built to Last

If your cushions are looking a little worse for wear, or you’re simply after a better fit, look no further. Our custom-made square and rectangular cushion covers offer a stylish, practical upgrade for almost any setting. Whether you’re updating a sofa at home, a campervan bunk, a caravan seat, or a bench in a boat cabin, we’ve got you covered — literally.


Versatile Cushion Covers That Fit Your Life

From the living room to the lake, our bespoke covers are designed to suit a wide range of environments. Whether it’s a cosy window seat, a motorhome lounge, or a narrowboat nook, our covers are made to your exact dimensions — no compromises.

Moreover, because every cover is tailored from scratch, there’s no awkward tugging, stretching, or settling for “close enough.” Instead, you get a professional fit that looks sharp and functions beautifully.


Crafted to Your Spec, Styled Your Way

To help you get the perfect match, we offer a variety of cover styles. That way, whether you want something sleek and modern or soft and traditional, you’ll find something that fits the bill:

  • Wrap Style – clean and contemporary, with or without piping

  • Box Style – crisp, defined edges for a more formal finish

  • Box with Piping – a timeless look with a bit of polish

  • Box Pleat Style – adds elegance and structure, great for classic interiors

Each one is individually cut and sewn — so instead of stock sizes and shortcuts, you get top-drawer craftsmanship.


Fabric Choices for Every Use

What’s more, we offer a wide range of high-quality fabrics to match your setting. For outdoor or mobile use, such as boats, caravans, and campers, we recommend UV-stable and water-resistant options that can take the elements in stride.

Meanwhile, for indoor seating, you’ll find soft, stylish materials available in a variety of colours and textures — all handpicked for durability and comfort. So, whether you want something hard-wearing or something cosy, we’ve got it.


Need a Foam Interior Too? We’ve Got That Covered

In addition to the covers, we can also supply foam inserts, cut precisely to size. Choose from high-density firm foams for structured seating, or Reflex foam for a softer, more relaxed feel. So, whether you’re building from scratch or revamping an old favourite, we’ve got everything you need under one roof.


Practical Features That Make a Big Difference

We’ve also thought about the small things — the kind that make everyday use easier:

  • You can choose from several zip positions, depending on what works best

  • Add Dacron or Stockinette wrap to give your cushion a fuller, smoother shape

  • Opt for non-slip bases, tie-backs or Velcro fastenings to keep things in place — especially helpful in boats or moving vehicles

  • And, of course, all our covers are removable and washable, so keeping them clean is a breeze

On top of that, you can even specify different fabrics for each side — ideal if you like to change the look with the seasons or create a reversible finish.


A Smarter, Greener Alternative to Buying New

Let’s be honest: throwing out a perfectly good cushion just because the cover’s worn out is a waste — of money and materials. With our custom covers, you keep what works and replace what doesn’t. As a result, you save cash and avoid landfill — it’s a win-win.

Especially in spaces where cushions are an awkward shape or hard to replace (we’re looking at you, campervans and boat cabins), custom covers are simply the most practical choice.


How to Order – Step by Step

We’ve made it easy — no faff, no confusion:

  1. Start by choosing your preferred unit of measurement (mm, cm, or inches)

  2. Then enter the cushion’s length, width, and depth

  3. Next, select your preferred style and any optional extras

  4. After that, add any special notes (e.g. zip position, front-facing side, etc.)

  5. Finally, click “Add to Cart” and let us do the rest

Still unsure which fabric to go with? No worries — we’ll happily send out some samples before you commit.


Why Choose Us?

At Foam4U, we combine traditional upholstery know-how with modern materials and methods. Everything we make is built to fit and made to last, with genuine care and attention to detail — the kind you can’t get from off-the-shelf alternatives.


So whether you’re revamping your lounge, refreshing your boat cabin, or fine-tuning your camper interior — our custom cushion covers are the perfect finishing touch.

Proudly designed and hand-finished in the UK.

 

Our sister website www.thefoamshop.co.uk

 

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