Small Double Mattress Protectors

Protect your 4ft bed with our Small Double mattress protectors, designed for a secure fit beneath your fitted sheet. Choose from soft quilted everyday protection or a waterproof quilted option for added protection against spills, with fitted designs suitable for deeper mattresses.

Small Double Mattress Protectors for 4ft Beds

A Small Double is a useful middle ground when a Single feels too narrow but a full Double takes up more room than you have available. Finding bedding for one can sometimes be less straightforward, which is why it is worth checking the size rather than assuming a standard Double protector will fit.

Our Small Double mattress protectors are designed for 4ft beds and sit directly over the mattress, underneath your fitted sheet. They add a practical layer between your mattress and everyday bedding while keeping the bed easy to make and care for.

Choose between quilted everyday protection and a waterproof quilted option depending on how you use the bed.

Quilted or Waterproof Small Double Mattress Protector?

Both styles protect the mattress, but they are designed with slightly different priorities.

Quilted Mattress Protector

A quilted Small Double mattress protector is a good choice when you mainly want a soft protective layer between your mattress and fitted sheet.

The quilted surface adds a light layer of cushioning while helping protect the mattress from everyday dust, marks and general wear. It is a practical option for a main bed, guest room or spare room where waterproof protection is not essential.

Waterproof Mattress Protector

If protection against accidental spills is a priority, choose our Small Double waterproof mattress protector.

It combines a soft quilted sleeping surface with a waterproof protective layer underneath, helping protect the mattress from everyday spills and accidents without using a loose plastic-style cover.

The waterproof option can be particularly useful for family homes, guest beds or any mattress where you would prefer an additional barrier against liquids.

What Size Is a Small Double Mattress Protector?

A UK Small Double bed is also commonly referred to as a 4ft bed. Small Double mattresses are generally around 120–122cm wide and approximately 190cm long, although individual mattress dimensions can vary slightly.

Our Small Double protector options are designed around the 4ft bed size. Always check the measurements shown on the individual product page before ordering, especially if your mattress is imported, custom-made or unusually deep.

Small Double vs Double Mattress Protector

A Small Double and a standard Double are not the same size.

A Small Double is approximately 4ft wide, while a standard UK Double is approximately 4ft 6in wide. Using a Double protector on a Small Double mattress can leave unnecessary fabric around the sides, while using a Small Double protector on a standard Double mattress will usually be too tight.

For the neatest fit, choose the protector that corresponds with your actual mattress size.

Choosing the Right Mattress Protector Depth

Width and length are only part of the fit. You should also measure the depth of your mattress.

Measure vertically from the top sleeping surface to the bottom edge of the mattress. If a mattress topper stays permanently on the bed beneath the protector, include its height in your total measurement.

Selected Stoftly protectors are available with deeper fitted skirts to accommodate thicker mattresses and mattress-and-topper combinations.

30cm Deep Mattress Protection

A 30cm fitted depth can suit mattresses that need more side coverage than a shallower protector while still maintaining a neat fit around the bed.

40cm Extra Deep Mattress Protection

A 40cm fitted skirt gives you additional depth for thicker mattresses or beds where a topper increases the overall height.

The deepest option is not automatically the best one. Measure your mattress first and choose enough depth to sit comfortably around the sides without leaving excessive loose fabric.

Should a Mattress Protector Be Bigger Than the Mattress?

Not usually. A mattress protector should correspond with the width and length of your mattress while providing enough fitted depth to wrap around the sides.

Buying a protector that is significantly larger can allow excess material to bunch underneath your fitted sheet. A protector that is too small may feel overly stretched or struggle to stay around the mattress corners.

Check the mattress width, length and depth before ordering rather than simply choosing a larger size for extra room.

Where Does a Mattress Protector Go on the Bed?

A mattress protector normally sits directly over the mattress and underneath your fitted sheet.

A straightforward bed setup is:

  1. Mattress
  2. Mattress protector
  3. Fitted sheet

If you use a mattress topper, your setup may depend on what you want the protector to cover. If you want both the mattress and topper underneath the protector, measure their combined depth first to make sure the fitted skirt has enough room.

Mattress Protector or Mattress Topper?

They do different jobs.

A mattress protector is primarily a protective bedding layer. A mattress topper is designed to alter the comfort or feel of your mattress.

You do not need to choose one instead of the other. They can be used together, provided the protector has enough fitted depth for the mattress-and-topper combination.

How to Choose a Small Double Mattress Protector

Start with what you want the protector to do.

If your main priority is a soft quilted layer for everyday use, a standard quilted protector may be all you need. If accidental spills are more of a concern, choose a waterproof version.

Then check three measurements:

  • Width – confirm that you have a Small Double / 4ft mattress.
  • Length – compare your mattress with the dimensions shown on the product page.
  • Depth – include a topper if it will sit underneath the protector.

This is more reliable than choosing on the product name alone.

How Often Should You Wash a Mattress Protector?

How often you wash it will depend on how the bed is used. A main bed will normally need its protector cleaned more regularly than an occasional guest bed.

Always follow the care label supplied with your protector. Our current quilted and waterproof mattress protectors are machine washable, making them straightforward to remove and clean as part of your usual bedding routine.

Shop Small Double Mattress Protectors

Choose the protector that best matches your 4ft mattress and how you use your bed. Go for a quilted design for comfortable everyday protection, or choose a waterproof quilted protector when you want an additional barrier against spills and accidents.

Looking for another bed size? Browse our complete mattress protectors collection for Single, Double, King and Super King options.

Not sure whether you need a quilted or waterproof protector, or which fitted depth is right for your 4ft bed? Read our mattress protector buying guide for help with protector types, UK sizing and mattress depth.

FAQ

Can you get a Small Double mattress protector?
Yes. Small Double mattress protectors are designed specifically for 4ft beds. Stoftly offers Small Double options in both quilted and waterproof quilted designs.
Is a Small Double mattress the same as a Double?
No. A Small Double is approximately 4ft wide, whereas a standard UK Double is approximately 4ft 6in wide. Choose a protector designed for your actual mattress size rather than using a Double protector on a Small Double bed.
Is 120 x 190cm a Small Double?
Approximately, yes. UK Small Double mattresses are commonly around 120–122cm wide and around 190cm long. Dimensions can vary slightly between manufacturers, so check your own mattress before ordering.
What size is a UK Small Double mattress protector?
A Small Double protector is designed for a 4ft mattress. Check the individual product measurements as well as the fitted depth, particularly if you have a thick mattress or use a topper.
Should a mattress protector be bigger than the mattress?
No. It should generally match the mattress width and length while having sufficient pocket depth to fit around the sides. A protector that is unnecessarily large may bunch underneath your fitted sheet.
Should I choose a waterproof mattress protector?
Choose waterproof protection if you want an additional barrier against accidental spills or liquids. If waterproofing is not important to you, a quilted protector can provide a soft protective layer for everyday use.
Does a mattress protector go over or under a mattress topper?
If you want the protector to cover both the mattress and topper, place the topper on the mattress first and fit the protector over both. Check their combined depth to make sure the protector will fit comfortably.
Do I need both a mattress topper and a mattress protector?
Not necessarily. They serve different purposes: a topper changes the feel of the bed, while a protector adds a protective layer. You can use either one or both depending on what your bed needs.
Can I wash a Small Double mattress protector?
Our current Small Double quilted and waterproof quilted protectors are machine washable. Always follow the care instructions on the product label for the specific protector you purchase.