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Complete Guide to Twin Bed Sizes: Optimize Your Sleep Space

Complete Guide to Twin Bed Sizes: Optimize Your Sleep Space

Sleep, a seemingly simple daily activity, actually has a crucial impact on our physical and mental health. As one of the most important factors in supporting the quality of sleep, the choice of mattress can be a profound science. When we talk about mattress selection, 'mattress size' is undoubtedly a keyword.


However, if we go a little deeper, for example, 'what are the dimensions of two single beds put together' and 'can two single beds be put together to form a queen-size bed', these questions are no longer so simple. Next, I will reveal the answers behind these questions from a professional point of view, and guide you on how to choose the right mattress for your needs, so let's explore the mystery of mattress sizes together!


Basic concept: single bed size

mattress sizes


Single beds, also known as single mattresses, usually measure 39 inches wide (about 99 cm) and 75 inches long (about 190.5 cm). However, it is worth noting that different regions and manufacturers may have different definitions of single bed dimensions, for example, a long single bed may increase in length to 80 inches (about 203 cm). Understanding this is crucial to our understanding of mattress sizing standards.


Splice two single beds: the creation of a new size


If you put two standard single beds together, then you get a mattress space that is 78 inches (about 198 cm) wide and 75 inches (about 190.5 cm) long. This is wider than most common mattress types (e.g. full size beds, queen size beds, and super king size beds). As such, this approach is a solution that provides more spacious sleeping space.


Comparative analysis: two single beds and other sizes of beds


Firstly, let's discuss the dimensions of a single bed. Typically, a single bed measures 39 inches wide (about 99 cm) and 75 inches long (about 190.5 cm). When you put two of these beds together, you get a mattress that is about 78 inches wide (about 198 cm). This size is significantly wider than standard queen-size beds (usually 60 inches, about 152 cm) and full-size beds (54 inches, about 137 cm).


Take a look at the super king size bed, also called a king size bed, which measures 76 inches wide (about 193 cm) and 80 inches long (about 203 cm). As you can see, two single beds put together are actually wider than a king size bed, but slightly shorter in length.


If we then go on to compare the California king size bed, which measures 72 inches wide (about 183 cm) and 84 inches long (about 213 cm), you will see that it is narrower in width than the two single beds, but much longer in length.


Therefore, the size of putting two single beds together from a width point of view is very rare in the market. It offers very generous sleeping space, which is ideal in situations where there is a need for this kind of spacious mattress space, such as when there are children who may climb into the adult bed, or pets who like to sleep in the bed.


However, from a length perspective, two single beds put together may be slightly shorter, which may not be ideal for taller people. It's a matter of weighing up the choice based on the height and comfort of the specific user.


Finally, for some specific mattress sizes, such as the Queen RV (60" x 75", approx. 152cm x 190.5cm) or Short King (72" x 75", approx. 183cm x 190.5cm), the two single beds may be larger than they are in width and length. These sizes are often used in recreational vehicles or special bedroom spaces, so you also need to choose a mattress size based on the specific use case.


Overall, two single beds put together can provide more space than most standard bed sizes, but suitability will need to be determined by the needs of the specific user and the space in the bedroom.


Splicing of two single beds

 mattress sizes

When we talk about splicing two single beds together, there may be some dilemmas to solve. Even if you place the two beds closely side by side, the gap between the mattresses may cause discomfort, especially if you try to sleep in the centre part of the bed. In order to solve this problem, there are a number of measures that need to be taken, which include the use of bed bridges and mattress joining straps.


  • Bed bridges: a bed bridge is a special padding device designed with the idea of creating a smooth transition between two mattresses, making them appear more like one continuous bed. It is usually made of a soft but dense material that can be placed between two mattresses. The bridge is thicker at the edge portion of the mattress and then tapers towards the centre, which ensures that it creates a smooth transition between the mattresses, making them look more like one piece.


  • Mattress Attachment Straps: Mattress Attachment Straps are usually made of a stretchy fabric that can be fastened around two mattresses to bind them tightly together. These straps usually have two ends that can be secured to the bottom of the mattresses to ensure that they don't separate during use. In addition, mattress joining straps are usually wide enough to cover the gap between the two mattresses, thus further enhancing sleeping comfort.


  • Customised sheets and bedspreads: in addition to the tools mentioned above, you can also consider using customised sheets and bedspreads. These sheets and bedspreads are usually larger than the total size of the two single beds so that they can cover and enclose the entire mattress, making the two beds look more like one queen-sized bed.


Split king size bed vs. two single beds


Split king size beds, also known as split super king size beds, typically measure 76 inches (approx. 193 cm) wide and 80 inches (approx. 203 cm) long, and it usually consists of two single beds that are 38 inches wide (approx. 96.5 cm) making it a bed type that can be flexible enough to cope with different needs.


Unlike a regular king-size bed (one integral large mattress), the main advantage of a split king-size bed is flexibility and individual configuration. Firstly, each side of the mattress can be independently adjusted for firmness, height angle and comfort according to individual needs. This is ideal for sleep partners who require different sleeping environments - for example, one person may prefer a firm mattress while another may prefer a soft mattress. Also, if a person prefers to elevate their legs while sleeping or needs to adjust the incline of the mattress to improve sleep breathing, a split king size bed will meet their needs.


However, as opposed to two single beds side by side, split king size beds may require additional equipment and accessories such as specialised bed frames, mattress connectors and sheets to ensure a seamless connection between the mattresses, making the whole bed look like one. This increases the cost of purchasing and using a split king size bed to some extent.


On the other hand, two single beds placed side by side, while comparable in actual size to a split king size bed, they offer less flexibility in use. Firstly, two single beds do not offer independent firmness and angle adjustments. In addition, if regular sheets and bedspreads are used, possible gaps between the mattresses can affect the comfort of use. However, from a cost point of view, two single beds are usually more economical than split king-size beds.


Scenario: when to choose two single beds to join together

 mattress sizes

Determining when to join two single beds is based on a number of practical considerations and needs. These include space requirements, personal comfort, and the specific needs of the environment in which they will be used. I will explain each of these aspects in further detail below.


  • Space requirements: For people who need more sleeping space, two single beds can be an effective solution. For example, tall people or those who turn over a lot may find that a standard queen or king size mattress does not meet their needs, making two single beds a good choice.


  • Individual Comfort: Splicing two single beds is also a viable option if there is a significant difference in mattress firmness preference between users on either side of the bed. In this way, each person can choose the firmness of the mattress according to his or her preference, thus improving sleep comfort.


  • Guest room use: In establishments such as hotels or hostels, the option of two single beds spliced together can offer a higher degree of flexibility. Depending on the needs of the guest, two single beds can easily be placed side by side or spliced together to form a queen-size bed. This approach can cater for a variety of guest needs.


  • Family Environment: In a family environment, especially for families with children, flexibility may be needed to change the bed configuration. For example, when a child grows out of a cot and needs a single bed, or when guests come to visit and need additional sleeping space on a temporary basis, splicing two single beds is an ideal solution.


  • Special needs: For people with special physical needs, such as long-term bedridden patients or the disabled, two single beds spliced together can offer even more adaptability. For example, the mattress can be adapted to their needs or the angle of the mattress can be adjusted using a motorised bed frame.


How to buy the right mattress for a single bed


  • Mattress size: the most basic requirement is that the mattress needs to be able to completely cover the bed frame and be compatible with the height of the user. When choosing a mattress for a single bed, as a general rule, the size of the mattress should be 39 inches wide (about 99cm) and 75 inches long (about 190.5cm). If the user is taller, you may need to choose a long single bed mattress with a length of 80 inches (about 203 cm).


  • Types of mattresses: There are various types of mattresses available on the market, including spring mattresses, memory foam mattresses, latex mattresses, foam mattresses, and more. Each type of mattress has its own unique advantages and disadvantages. For example, spring mattresses offer good support and ventilation, but may not be able to fully adapt to your body's curves; memory foam mattresses offer excellent pressure relief, but may be too hot; latex mattresses offer both good support and good pressure relief, but may be on the higher end of the price spectrum.


  • Mattress firmness: this depends largely on the user's sleeping habits and weight. In general, side sleepers may prefer a softer mattress as this can help relieve pressure points on the body; back and stomach sleepers may prefer a firmer mattress as this can provide better support. For heavy sleepers, choosing a firmer mattress can provide better support and prevent the mattress from collapsing excessively.


  • Material of the mattress: The material of the mattress will also affect the comfort and durability of the mattress. Spring mattresses usually use wire springs, memory foam mattresses use high-density foam, and latex mattresses use natural or synthetic latex. Mattresses made of different materials have different levels of resilience and durability and should be chosen according to your needs when purchasing.


  • Edge support of the mattress: If you are considering the possibility of joining two single beds together in the future, the edge support of the mattress is also a factor to consider. A mattress with strong edge support will ensure that the edges of the mattress don't collapse excessively, which is good for durability and quality of sleep.


In this article, we discuss in detail about single and double mattress sizes and how to put together two single mattresses to fit different space requirements. We also share various factors to consider when shopping for a mattress, such as the type of mattress, firmness, and material, to help you find the best mattress for you.


Remember, choosing a mattress is a very personal process and the final choice should be based on your physical needs, sleeping habits and budget. We hope our guide has provided you with valuable assistance when choosing a mattress. If you have any other questions about mattress sizes and choosing a mattress, please feel free to leave a comment or contact us.


Last but not least, if you find our article helpful, you may want to share it with your friends and family so that they can benefit from it as well. Thank you for reading and we look forward to seeing you again in our next article!


Suilong is always committed to providing you with the most professional and practical mattress buying guide to make your sleep healthier and more comfortable.




Q: What size is it when you push two twin beds together?

A: When you push two twin beds together, the combined width would be around 78 inches, which is roughly equivalent to a king-sized bed in width.


Q: Do 2 twin beds make a queen?

A: No, two twin beds pushed together do not make a queen. They form a size close to a king size bed, which is wider than a queen size bed.


Q: Can 2 single beds make a king size bed?

A: Yes, when you put two single beds together (each typically 39 inches wide), you get a width of around 78 inches, which is approximately the width of a standard king size bed.


Q: How do you join two single beds together?

A: To join two single beds together, you can use a bed bridge or bed connector. It's a piece of foam that goes in the gap between the two mattresses, and often comes with a strap to go around the sides of the beds to keep them together.


Q: Is a split king the same as two twins?

A: A split king is the same size as two twin XL beds put together, not standard twin beds. Twin XL beds are longer than standard twin beds, making them the same length as a king or split king bed.

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