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Single Mattress Size: Understanding Dimensions

From the Puffy Editorial Team | 4 min read.
Single Mattress Size: Understanding Dimensions

Selecting the right mattress size is fundamental to achieving comfortable and restful sleep. Single mattresses, often ideal for children, teenagers, or adults with limited space, come with specific dimensions that vary slightly by region. This guide will provide detailed insights into single mattress sizes, helping you make an informed decision for your sleeping arrangements.

Single Mattress Dimensions

Understanding the standard dimensions of a single mattress is key to finding the right fit.

Typical Measurements:

  • Width: Approximately 38 inches (96.5 cm).
  • Length: Usually around 75 inches (190.5 cm).
  • Depth: Can vary, but commonly ranges from 8 to 14 inches (20 to 35.5 cm).

These dimensions are perfect for smaller spaces and can be a great choice when paired with Puffy Lux Mattress for a comfortable, space-saving sleep solution.

How Big Is a Single Mattress?

The size of a single mattress makes it an ideal choice for compact rooms or specific needs.

Space Considerations:

  • Room Size: Best suited for smaller rooms or multi-use spaces.
  • Occupant Size: Ideal for one person, providing ample sleeping space.

How Wide Is a Single Mattress?

The width of a single mattress is designed to comfortably accommodate one sleeper.

Width Details:

  • Standard Width: Around 38 inches, providing enough space for an individual to sleep comfortably.
  • Comparison with Other Sizes: Narrower than a twin or double mattress, making it more space-efficient.

How Long Is a Single Mattress?

The length of a single mattress is an important consideration, especially for taller individuals.

Length Specifications:

  • Standard Length: Typically 75 inches, suitable for most children and adults.
  • Taller Individuals: Those over 6 feet tall may require an extra-long single mattress.

Interested in how Puffy stacks up against other brands? Check out our mattress comparisons: Puffy vs Purple, Puffy vs Nectar, Puffy vs Casper, Puffy vs Leesa, Puffy vs Saatva, Puffy vs DreamCloud, and Puffy vs Tuft and Needle.

Single Mattress vs Twin

Comparing single and twin mattresses is essential for those trying to choose the most suitable option for their space and sleeping needs.


  • Dimensional Differences: While often similar in size, in some regions, single and twin mattresses may vary slightly. Typically, a single mattress is 38 inches wide by 75 inches long, and a twin mattress often shares these dimensions. However, slight variations can exist depending on the manufacturer.
  • Use Cases: Single mattresses are commonly used in children’s bedrooms, small guest rooms, or for individuals with limited living space. Twin mattresses, on the other hand, are versatile and can be used in adult guest rooms, college dorms, and also for children who need more room to grow.
  • Bedding and Accessories: It’s important to note that bedding and accessories like sheets and mattress protectors may be marketed specifically for either single or twin sizes, which can affect your choice based on the availability of these items.

Room Layout and Design:

  • Furniture Proportion: In smaller rooms, a single mattress might be more proportionate to the space available, while a twin could be more suitable for a larger room.
  • Decor and Styling: Depending on the decor and style of the room, one may choose a single or twin mattress to better complement the overall aesthetic.
  • Future Room Changes: Consider future uses of the room. A twin mattress might offer more versatility if the room is repurposed later for a guest room or office space.

Understanding these nuances between single and twin mattresses helps in making an informed decision that aligns with your specific requirements for space, comfort, and room design. While similar in many ways, the choice between a single and a twin mattress can have implications for the usability and functionality of your sleeping area.

Additional Considerations for Single Mattress Size

When choosing a single mattress, other factors should also be taken into account.

Additional Factors:

  • Bed Frame Size: Ensure the bed frame matches the mattress size.
  • Room Layout: Consider how the mattress will fit within the overall room design.
  • Future Needs: Think about the longevity of the mattress size in relation to the user’s age and growth.

Check out Puffy mattress reviews from real customers and see how we compare with other brands.

FAQs on Single Mattress Size

  • Can two people sleep on a single mattress?: It’s designed for one person, so it might be cramped for two.
  • Is a single mattress suitable for a bunk bed?: Yes, most bunk beds are designed to fit single mattresses.
  • How to measure space for a single mattress?: Measure the area where you plan to place the bed, ensuring there’s enough room for easy movement around it.


A single mattress offers a practical and comfortable sleeping solution for individuals with limited space or specific needs. Understanding its dimensions and how it compares to other sizes like the twin mattress is essential in making the right choice.

Use our store locator to find the closest furniture or mattress store near you and feel the cloudlike comfort of our Puffy Mattress in person.

Whether for a child’s room, a guest room, or a small apartment, a single mattress can provide the comfort and support needed for a good night’s sleep, especially when paired with high-quality options.

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