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King Size Med/Firm Childrens Mattresses

A medium-firm mattress is a level of firmness that is slightly firmer than a medium mattress but still has a moderate amount of "give". A medium firm mattress is extremely comfortable. It's perfect if you want a little extra support but still, like your bed to feel cosy and soft.

A children's mattress provides the right balance of comfort and support for growing kids. Designed with breathable materials, hypoallergenic options, and firm yet comfortable surfaces, these mattresses promote healthy spinal alignment and quality sleep. Available in single, double and bunk bed sizes, they fit various bed frames. Many feature water-resistant covers, memory foam, or pocket springs for extra durability.

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  2. Comfort Rating
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Size

  1. Small Single

    2'6" x 6'3" | 75cm x 190cm

    1 item

  2. Single

    3' x 6'3" | 90cm x 190cm

    4 items

  3. Small Double

    4' x 6'3" | 120cm x 190cm

    2 items

  4. Double

    4'6" x 6'3" | 135cm x 190cm

    3 items

  5. King Size

    5' x 6'6" | 150cm x 200cm

    3 items

  6. Super King

    6' x 6'6" | 180cm x 200cm

    2 items
Comfort Rating
  1. tension-image

    Soft/Med

    Balances comfort and support, providing a soft feel Ideal for sleepers with a lighter build who may find a medium mattress too firm and want a little extra give.

  2. tension-image

    Medium

    Often considered a universal comfort option, suitable for most people regardless of weight, sleeping position or preference.
  3. tension-image

    Med/Firm

    Provides a slight firmness, perfect if you want the extra support but still like your bed to feel cosy and soft.
  4. tension-image

    Firm

    Offers very little give or sink, providing an exceptionally supportive sleeping surface and ideal for people who like to sleep on top of their mattress
Mattress Core

  1. Pocket Springs

    Pocket springs work independently to each other, providing more support and reducing motion transfer.

  2. Memory Foam

    Memory foam uses your body heat to soften and mould to your shape.

  3. Open Coil Springs

    Open coil spring mattresses are a type of coil spring made from a single wire coiled into a helical shape. Open coil mattresses are known for their affordability and durability,

  4. Miracoil Springs

    Miracoil springs provide targeted support and enhanced comfort for sleepers.

  5. Comfort Layers

    A generous mix of upholstered fillings to create a luxurious comfort layer to the mattress
Features

  1. Hypoallergenic & Dust Mite Resistant

    Resists dust mites, mold, and bacteria, Ideal for people with allergies or asthma

  2. Reduces Partner Disturbance

    Perfect for couples, as movement on one side won’t disturb the other.

  3. Pressure Relieving

    Pressure-relieving mattresses are designed to distribute the body's weight more evenly across the surface of the mattress, reducing pressure on specific points such as the hips, shoulders, and spine.

  4. Ideal for All Sleeping Positions

    Offers balanced support, whether you sleep on your back, side, or stomach.

  5. No Roll-Together

    Each spring moves independently, preventing sagging or dips over time.

  6. Lightweight & Easy to Move

    A lighter mattress, making it easy to move or transport.

  7. Good Airflow & Breathability

    The open coil structure allows air to circulate, helping to prevent overheating.

  8. Extra Support & Spinal Alignment

    The Individual pocket springs move independently, adapting to your body's contours which creates targeted support, reducing pressure points on the back, neck, and joints.
Mattress Depth

  1. 20cm-24cm

    1 item

  2. 25cm-29cm

    2 items
Brand

  1. Silentnight

    Silentnight beds and mattresses with up to 50% off RRP

  2. Giltedge Beds

    Giltedge Beds offer a range of beds, mattresses and headboards at unbeatable prices.

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  1. Giltedge Beds Elerby Mattress
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    tension

    Med/Firm

    Firmness

    Med/Firm · 4 / 5

    1

    2

    3

    4

    5

    Mattress Type:

    Open Coil Springs

    Open Coil Springs

    Comfort Layers

    Comfort Layers

    Giltedge Beds Elerby Mattress

    Rating:
    96%
    4.8 · 5  reviews
    Mattress Core
    Open Coil Springs
    Comfort Layers
    Mattress Depth
    25 cm depth
    Sale From
    £208.33
    £250.00
    Was £250.00
    RRP £389.00
    free-delivery

    Free delivery from Friday 22nd May

    brand
  2. Silentnight Classic Miracoil Memory Mattress
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    tension

    Med/Firm

    Firmness

    Med/Firm · 4 / 5

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    2

    3

    4

    5

    Mattress Type:

    Memory Foam

    Memory Foam

    Miracoil Springs

    Miracoil Springs

    Silentnight Classic Miracoil Memory Mattress

    Rating:
    98%
    4.9 · 59  reviews
    Mattress Core
    Memory Foam
    Miracoil Springs
    Mattress Depth
    25 cm depth
    Sale From
    £259.09
    £285.00
    Was £285.00
    RRP £469.00
    free-delivery

    Free delivery from Friday 22nd May

    brand
  3. Giltedge Luxury Pocket 1000 Mattress
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    Med/Firm

    Firmness

    Med/Firm · 4 / 5

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    Pocket Springs

    1000 Pocket Springs

    Giltedge Luxury Pocket 1000 Mattress

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    Mattress Core
    1000 Pocket Springs
    Mattress Depth
    28 cm depth
    Sale From
    £308.33
    £370.00
    Was £370.00
    RRP £423.00
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    Free delivery from Friday 22nd May

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Childrens Mattresses FAQ's

What size mattress is best for a child?

Choosing the right size mattress for a child depends on their age, height, and sleeping needs. The most common options are toddler, twin (single), and full (double) mattresses.

For toddlers transitioning from a cot, a toddler mattress is an option but would need replacing quite soon as the child outgrows it, many parents prefer to skip the toddler mattress and move straight to a single mattress (90cm (38") x 190cm (75")), which is the most popular choice for growing kids. It provides ample space and fits most bunk beds, mid sleepers, and standard bed frames.

For taller children or those who need more space to move around, a small double (120cm (38") x 190cm (75")) or double (double) mattress (135cm(54)" x 190cm (75")) may be better. A full mattress allows extra room for stretching and can last well into the teenage years.

Ultimately, the best size depends on room space, budget, and long-term comfort. Investing in a high-quality, supportive mattress ensures your child gets a good night’s sleep, essential for healthy growth and development.

How Firm Should a Children's Mattress Be?

The firmness level of a children’s mattress is crucial for their comfort, spinal support, and overall sleep quality. The ideal firmness depends on their age, weight, and sleeping habits.

For toddlers and younger children, a medium-firm to firm mattress is recommended. This provides proper spinal alignment and prevents sinking too deeply, which can be unsafe for younger sleepers. A firmer mattress also supports growing bones and muscles, reducing the risk of discomfort or poor posture.

For older children and teenagers, a medium to medium-firm mattress is often preferred. This allows for a balance between support and comfort, adapting to different sleep positions. Side sleepers may prefer a slightly softer surface, while back and stomach sleepers need more firmness to prevent misalignment.

Memory foam, hybrid, and pocket-sprung mattresses are popular choices, offering both support and pressure relief. Some options also feature zoned support, catering to different areas of the body.

Ultimately, the best mattress firmness for a child depends on their age, weight, and comfort preference. A breathable, supportive, and durable mattress ensures they get the restful sleep needed for healthy growth and development.

Do children's mattresses need to be hypoallergenic?

A hypoallergenic children’s mattress is highly recommended, especially for kids prone to allergies, asthma, or sensitive skin. Hypoallergenic mattresses are designed to resist dust mites, mold, and bacteria, reducing common triggers for allergies and respiratory issues.

Children have developing immune systems and can be more vulnerable to airborne allergens. Standard mattresses can accumulate dust, pet dander, and moisture, which may lead to discomfort, congestion, or skin irritation. Hypoallergenic mattresses use breathable, antimicrobial, and non-toxic materials such as organic cotton, latex, or memory foam with protective covers. Some models also feature waterproof layers to prevent spills and moisture buildup.

Even if a child doesn’t have allergies, a hypoallergenic mattress ensures a cleaner and healthier sleep environment by preventing the growth of bacteria and allergens. Regular cleaning and the use of washable mattress protectors further enhance protection.

Ultimately, choosing a hypoallergenic mattress helps promote better sleep, improved air quality, and long-term comfort for children, making it a smart investment for any parent concerned about their child’s health and well-being.

Are waterproof mattresses good for kids?

Yes, waterproof mattresses are an excellent choice for kids. They offer protection against spills, bedwetting, and accidents, keeping the mattress clean, dry, and hygienic. Young children, especially toddlers and those transitioning from potty training, benefit from a mattress that resists moisture, preventing stains and bacteria buildup.

A waterproof mattress or a waterproof mattress protector helps extend the lifespan of the mattress by preventing liquid absorption, mold, and unpleasant odors. Many waterproof mattresses use breathable, hypoallergenic materials that provide comfort while maintaining airflow and temperature regulation, ensuring a restful sleep.

In addition to hygiene, waterproof mattresses are also easier to clean. A quick wipe with a damp cloth or mild detergent can remove most messes, reducing the need for deep cleaning or replacements.

Overall, waterproof mattresses are a practical and hygienic option for kids, offering durability, cleanliness, and peace of mind for parents.

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What is a king size?

A king-size provides more width than a standard double, offering additional comfort for couples who need more room to sleep comfortably.

UK King Size Dimensions

  • Width: 150 cm (5FT)
  • Length: 200 cm (6FT6)

A king-size is a popular choice for those who want more sleeping space than a standard double but may not have room for a super king. It balances space, comfort, and suitability for various bedroom sizes.

What are the benefits of a king size?

A king-size offers several benefits, particularly for those who value space and comfort in their sleeping arrangements. Here are some of the main advantages:

Benefits of a Kingsize

1. Ample Space:

  • A king-size provides plenty of room for couples to sleep comfortably without disturbing each other. This is especially beneficial for those who are restless sleepers or have different sleep patterns.

2. Comfort:

  • The larger sleeping area can contribute to a better night's sleep, as individuals can stretch out and move around freely.
  • Ideal for taller individuals who require more legroom.

3. Family-Friendly:

  • Perfect for families with children or pets who like to join in bed. The extra space accommodates everyone without feeling cramped.
  • Useful for parents who co-sleep with young children or need space for kids who occasionally join them during the night.

4. Aesthetics and Luxury:

  • A king-size can make a statement in the bedroom, adding a touch of luxury and elegance.
  • It can become the focal point of the room, enhancing the overall design and atmosphere.

5. Health Benefits:

  • Reduces disturbances from partner movements during the night, leading to improved sleep quality.
  • Provides more options for comfortable sleeping positions, potentially reducing back and joint pain.

6. Versatility:

  • More flexibility in sleeping arrangements, such as adding extra pillows or sleeping diagonally.
  • Can accommodate a variety of activities beyond sleeping, such as reading, watching TV, or working on a laptop, with plenty of room for pillows and blankets.

7. Resale Value:

  • Investing in a high-quality king-size can potentially increase the resale value of your bedroom set if you ever decide to sell it.

8. Shared Bedtime:

  • Provides space for couples to engage in activities together, such as watching movies or reading, without feeling cramped.

Overall, a king-size is an excellent choice for those who prioritize comfort, space, and luxury in their sleeping environment.

Who should buy a king size?

A king-size is a great investment for anyone who values space and comfort in their sleeping arrangements. Here are some specific situations and types of individuals who might benefit most from purchasing a king-size:

1. Couples:

  • Couples who prefer more personal space while sleeping can greatly benefit from the extra width of a king-size,
  • Those who experience sleep disturbances from their partner’s movements will appreciate the reduced motion transfer in a king-size.

2. Taller Individuals:

  • People who are taller than average may find that the additional length of a king-size offers more legroom and comfort compared to smaller sizes.

3. Families with Children or Pets:

  • Families who co-sleep with young children or share with pets will appreciate the extra space a king-size provides, allowing everyone to sleep comfortably without feeling crowded
  • Parents who occasionally have their kids join them for nighttime comfort or morning cuddles will find the space accommodating.

4. Individuals with Health Concerns:

  • People who suffer from back or joint pain may benefit from the ability to spread out and change positions easily, which can help reduce pressure points and improve sleep quality.
  • Those who require additional pillows or sleep aids for conditions such as sleep apnea may find a king-size more accommodating.

5. People Who Enjoy a Luxurious Sleep Environment:

  • Individuals who prioritize luxury and aesthetics in their bedroom will appreciate the king-size's ability to serve as a statement piece, enhancing the room's overall design and atmosphere.
  • Those who enjoy a hotel-like sleeping experience at home will find the king-size’s spaciousness appealing.

6. Active Sleepers:

  • People who tend to move around a lot during the night will appreciate the extra space to stretch out and shift positions without disturbing a partner.

7. Homeowners with Large Bedrooms:

  • Those who have a large master bedroom will find that a king-size fits proportionately, providing ample space for the bed and other furniture while maintaining a balanced aesthetic.

Conclusion

Overall, a king-size is ideal for couples, families, or individuals who want more space and comfort in their sleeping arrangements. It provides an excellent balance of luxury and functionality, making it a worthwhile investment for many people.

Are there any different references used for a king size?

Yes, the term "king-size" can have different meanings depending on the region and specific variations. Here are the different references and types of king-size commonly found:

Variations of King-Size

1. Standard King (Eastern King)

  • Dimensions (U.S.): 76 inches wide by 80 inches long (193 cm x 203 cm)
  • Use: This is the most common king-size in the United States, providing ample width for couples who want more space than a queen-size bed.

2. California King

  • Dimensions (U.S.): 72 inches wide by 84 inches long (183 cm x 213 cm)
  • Use: Popular on the West Coast, the California King is longer but slightly narrower than a Standard King, making it ideal for taller individuals.

3. UK King

  • Dimensions (UK): 60 inches wide by 78 inches long (150 cm x 200 cm)
  • Use: The UK king-size is slightly smaller than the U.S. king, but larger than the UK double, offering more space for couples in the UK.

4. UK Super King

  • Dimensions (UK): 72 inches wide by 78 inches long (180 cm x 200 cm)
  • Use: The largest standard size in the UK, providing ample space for couples who want the ultimate in comfort.

5. Split King

  • Dimensions: Typically the same as a Standard King but divided into two twin XL mattresses (each 38 inches wide by 80 inches long)
  • Use: Allows for different mattress firmness or adjustable bases on each side, offering individualized comfort for couples.

6. European King

  • Dimensions (EU): 63 inches wide by 79 inches long (160 cm x 200 cm)
  • Use: Slightly wider than the UK king, the European King is common in mainland Europe and provides a comfortable option for couples.

Conclusion

When choosing a king-size, it's important to consider the specific dimensions and regional standards that apply to ensure it meets your needs and fits your space. The various king-size options provide flexibility and customization, allowing you to select the best option for your comfort and room layout.

What are the disadvantages of a king size?

While a king-size offers many benefits, such as increased space and comfort, there are also some potential disadvantages to consider:

Disadvantages of a King-Size

1. Cost:

  • Higher Initial Investment: King-size and their associated bedding, such as sheets, duvets, and mattress protectors, are typically more expensive than smaller sizes.
  • Maintenance Costs: The larger size may lead to higher costs for cleaning and replacing bedding and mattress accessories.

2. Room Size Requirements:

  • Space Constraints: A king-size requires a larger bedroom to accommodate its dimensions comfortably while leaving enough space for movement and other furniture. In smaller rooms, a king-size might make the space feel cramped.

3. Mobility and Handling:

  • Difficult to Move: King-size can be heavy and cumbersome, making them challenging to move or reposition, particularly if you are relocating or redecorating frequently.
  • Assembly: Assembly can be more complex and time-consuming compared to smaller sizes, requiring more effort to set up.

4. Cost of Accessories:

  • Bedding Costs: King-size bedding, including sheets, comforters, and mattress protectors, is often more expensive and may require special sizes or custom options.
  • Storage: Larger bedding and accessories may require more storage space when not in use.

5. Room Layout:

  • Limited Flexibility: In smaller rooms, a king-size can limit your options for arranging other furniture and might restrict the flow of movement within the room.
  • Visual Balance: In a small room, a king-size might dominate the space, affecting the overall aesthetics and balance of the room.

6. Heat Retention:

  • Warmth: Larger sizes may retain more heat, which can be a disadvantage in warmer climates or for individuals who prefer a cooler sleeping environment. However, this can also be mitigated with appropriate bedding.

7. Comfort and Use:

  • Space vs. Intimacy: While the extra space can be comfortable, some people may prefer a smaller size for a cozier or more intimate feel, especially if they like to be close to their partner during sleep.

8. Maintenance:

  • Mattress Maintenance: A larger size can be harder to clean and maintain, especially if it becomes stained or needs to be rotated or flipped regularly.

Conclusion

A king-size provides substantial benefits in terms of space and comfort, but these advantages come with some trade-offs, including higher costs, space requirements, and practical considerations for handling and maintenance. Assessing these potential disadvantages in relation to your specific needs and room size can help determine whether a king-size is the right choice for you.

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