Mattress Toppers UK – 5cm & 10cm Bed Toppers

Give your bed a softer, more comfortable feel without replacing your mattress. Our mattress toppers come in 5cm and 10cm depths, fit every UK bed size from single to super king, and are filled with soft hollowfibre for cushioned, everyday comfort.

Mattress Toppers for a Softer, More Comfortable Bed

A mattress topper adds a separate cushioned layer above your existing mattress without replacing the mattress itself. It can soften the sleeping surface, add extra height and help create a fuller, hotel-inspired bed.

Stoftly mattress toppers are filled with soft hollowfibre and divided into quilted, box-stitched sections. Elasticated corner straps help secure the topper around the mattress and reduce movement during normal use.

They are a practical choice for main bedrooms, guest rooms and children’s beds when the mattress remains usable but you would prefer an additional layer of cushioning. Choose from 5cm and 10cm depths across popular UK bed sizes.

5cm vs 10cm Mattress Topper: Which Depth Should You Choose?

Choose a 5cm mattress topper for lighter everyday cushioning or a 10cm mattress topper for a deeper, fuller comfort layer. The right depth depends on how your mattress currently feels, how much additional bed height you want and the pocket depth of your fitted sheet.

Feature 5cm mattress topper 10cm mattress topper
Comfort feel Lighter surface cushioning Deeper, fuller cushioning
Best suited to Guest rooms, children’s beds and mattresses that already feel comfortable Main bedrooms and mattresses that feel firmer than preferred
Added height Approximately 5cm before normal compression Approximately 10cm before normal compression
Bed appearance Neat and lightly padded Fuller and more hotel-inspired
Fitted-sheet check Check the combined mattress and topper depth A deeper fitted sheet may be required

When to choose a 10cm mattress topper

A 10cm mattress topper is the deeper option for shoppers who prefer a more generously cushioned sleeping surface. It may suit a main bedroom where the existing mattress still feels supportive but is firmer than you would like.

Because a 10cm topper adds more height to the bed, measure the combined depth of your mattress and topper before choosing a fitted sheet.

When to choose a 5cm mattress topper

A 5cm mattress topper adds a lighter layer of padding without increasing the bed height as much. It is a practical choice for guest rooms, children’s beds or mattresses that already feel comfortable but would benefit from additional surface cushioning.

These recommendations are useful starting points rather than fixed rules. The best choice depends on your comfort preference, mattress condition and existing bedding.

Mattress Toppers for Every UK Bed Size

Choose a mattress topper that matches the labelled size and measurements of your mattress. Stoftly offers 5cm and 10cm options across the most popular UK bed sizes.

UK bed size Approximate mattress dimensions
Single mattress topper 90 × 190 cm
Small Double / 4ft mattress topper 122 × 190 cm
Double mattress topper 135 × 190 cm
King Size mattress topper 150 × 200 cm
Super King mattress topper 180 × 200 cm

Always check the mattress label or measure the mattress directly before ordering. Do not estimate the topper size from the outer dimensions of the bed frame.

Soft Hollowfibre Filling

Each topper contains soft, lightweight hollowfibre filling that creates an additional cushioned layer above the mattress. Hollowfibre provides a practical feather-free alternative to natural feather or down fillings.

The filling is distributed across the topper to create a soft and even sleeping surface. As with any filled bedding product, regular shaking and repositioning can help maintain its shape.

Quilted Box-Stitched Construction

Box stitching divides the topper into separate quilted sections to help distribute the hollowfibre filling across the sleeping surface.

This construction helps reduce excessive movement of the filling from one area to another. Normal compression will occur during use, so the topper should be shaken and aired regularly in accordance with its care instructions.

Elasticated Corner Straps for a Secure Fit

Elasticated straps fit around the four corners of the mattress to help keep the topper in position beneath the fitted sheet.

Place the topper evenly over the mattress, stretch one strap around each corner and then fit the sheet over both the mattress and topper. Check that the straps are not twisted or overstretched.

Available in White or Grey

Choose white for a crisp, classic hotel-inspired appearance or grey for a modern neutral finish.

The selected colour does not affect the topper’s filling, depth or construction. Availability and pricing may vary by size, depth and colour option.

Feather-Free Bedding

Stoftly mattress toppers use synthetic hollowfibre rather than natural feather or down. This makes them a practical option for shoppers who prefer feather-free bedding.

Feather-free and hypoallergenic are not interchangeable terms. Customers with diagnosed allergies or sensitivities should review the individual product information and care label before ordering.

Caring for Your Mattress Topper

Mattress toppers may arrive compressed for delivery. Remove the packaging carefully, spread the topper flat and allow the filling time to expand before placing it on the bed.

  • Shake and redistribute the filling regularly.
  • Air the topper when changing your bedding.
  • Keep it away from damp surfaces.
  • Clean spills promptly in accordance with the care label.
  • Machine wash only when the sewn-in label confirms that the selected topper is suitable.
  • Make sure the topper is completely dry before returning it to the bed.

Always follow the care instructions supplied with the individual product, as requirements may vary between sizes, colours and variants.

Stoftly Mattress Toppers at a Glance

  • Available in Single, Small Double, Double, King and Super King sizes
  • Choose from 5cm and 10cm depths
  • Soft, lightweight hollowfibre filling
  • Feather-free construction
  • Quilted box stitching to distribute the filling
  • Elasticated corner straps for a more secure fit
  • Available in white and grey options
  • Suitable for main bedrooms, guest rooms and children’s beds
  • Free 48 hours tracked UK delivery

FAQ

What is a mattress topper used for?
A mattress topper is placed on top of your existing mattress to add an extra layer of comfort. It can help make your bed feel softer, fuller and more cushioned without replacing the mattress underneath.
Which mattress topper thickness should I choose?
Choose a 10cm mattress topper if you want a deeper, thicker and more plush feel. Choose a 5cm mattress topper if you prefer a lighter comfort layer with less added height.
Is a 10cm mattress topper better for extra comfort?
The 10cm option is the best choice if you want a fuller and more cushioned sleep surface. It is especially useful if your mattress feels firm, tired or in need of extra softness.
When is a 5cm mattress topper a good choice?
A 5cm topper is a good choice for warmer weather, guest rooms, children’s beds or mattresses that already feel supportive but need a softer surface.
What mattress topper sizes are available?
Our mattress toppers are available in popular UK sizes, including single, small double / 4ft, double, king size and super king.
How do I choose the correct mattress topper size?
Choose the same size as your mattress. For example, use a double mattress topper for a double mattress and a king size mattress topper for a king size mattress.
What are the approximate UK mattress topper measurements?
The approximate sizes are: Single 90 x 190 cm, Small Double / 4ft 122 x 190 cm, Double 135 x 190 cm, King Size 150 x 200 cm and Super King 180 x 200 cm.
Do these mattress toppers stay in place?
Yes, each topper includes elasticated corner straps to help secure it to your mattress and reduce movement during the night.
What filling is used inside the mattress topper?
The toppers are filled with soft hollowfibre filling, giving your bed a cushioned, lightweight and feather-free comfort layer.
Are these mattress toppers hypoallergenic?
Yes, our mattress toppers are made with hypoallergenic, feather-free materials, making them suitable for customers who prefer allergy-conscious bedding.
Are the mattress toppers available in different colours?
Yes, selected mattress toppers are available in white and grey. White gives a clean bedding look, while grey offers a modern bedroom finish.
Can I use a mattress topper on an older mattress?
Yes, a mattress topper is a simple way to refresh an older, firm or tired mattress by adding a softer quilted layer on top.
Will the topper arrive compressed?
Your mattress topper may arrive compressed for delivery. Open it fully, shake it gently and allow it to expand and regain its shape before placing it on your bed.
Can I machine wash a mattress topper?
Yes, the topper is machine washable for easy home care. Always follow the care label instructions and allow it to dry fully before using it again.