The semi double mattress size is a size that falls between a single and a standard double, and it is not universally available across all markets. In Singapore, this size is more commonly referred to as super single, though the terms are sometimes used interchangeably across different regions and retailers.
Understanding what this size actually measures, how it compares to adjacent sizes, and when it is the right choice helps you make a well-informed decision.
What Is a Semi Double Mattress Size
In Singapore, the size most closely corresponding to a semi double is the super single, which measures approximately 107 centimetres wide by 190 centimetres long.
Some retailers or imported product listings may use the term semi double to describe a mattress in the 120 to 135 centimetre width range, which is narrower than a standard double at approximately 137 centimetres but wider than a super single at 107 centimetres. This variation reflects different regional naming conventions rather than a firmly standardised size.
When purchasing, always confirm the exact centimetre dimensions rather than relying on the size name alone. This prevents the confusion that can arise when the same term is used to describe different dimensions by different manufacturers or across different countries.
How Semi Double or Super Single Compares to Other Singapore Sizes
A single is approximately 91 by 190 centimetres, the standard size for one person in a smaller bedroom.
A super single is approximately 107 by 190 centimetres, offering meaningfully more width for a solo sleeper, approximately 16 centimetres more than a standard single.
A double is approximately 137 by 190 centimetres. It provides more width than a super single but is narrower than a queen.
A queen is approximately 152 to 153 by 190 centimetres, the most common choice for couples in Singapore.
A king is approximately 183 by 190 centimetres.
The super single, or semi double, sits comfortably in the gap between a single and a double, making it a practical choice for a solo sleeper who wants more space than a standard single but does not need or have room for a full double or queen.
When a Semi Double or Super Single Makes Sense
For a solo adult sleeper, the super single offers enough space to move around during the night without feeling confined to a narrow surface. This is particularly relevant for taller or more active sleepers who find a standard single too restrictive.
In Singapore's HDB bedrooms and smaller condominium rooms, a super single often provides a better balance between sleeping space and available floor area than a double or queen. A double or queen mattress in a bedroom that is too compact for it leaves very little manoeuvring space around the bed, making the room feel cramped.
For a study-bedroom or a multi-purpose room, a super single on a daybed or a storage frame is a practical choice that provides a comfortable sleeping surface without dominating the room.
For a teenager who has outgrown a single but is still using the bedroom solo, a super single is often the natural next step.
Choosing the Right Mattress in Super Single Size
The same construction considerations apply to a super single as to any other size. In Singapore's warm and humid climate, breathability is a relevant factor alongside support and firmness.
A pocketed spring mattress provides good support and natural airflow through the spring core. A memory foam mattress provides body contouring and motion absorption. A latex mattress offers breathable, responsive comfort.
The right choice depends on sleeping position, body weight, and personal preference. The Somnuz mattress collection includes options across different sizes and constructions. For guidance on what suits your needs, visit our mattress showroom in Singapore. The Sleep Well resource page provides broader guidance on sleep environments.
Frequently Asked Questions
What is semi double mattress size in Singapore?
In Singapore, the closest equivalent to a semi double is the super single, measuring approximately 107 centimetres wide by 190 centimetres long. Some retailers may use semi double to describe widths from 107 to 135 centimetres. Always confirm exact centimetre dimensions when purchasing.
Is a super single big enough for two people?
It is tight for two adults sleeping together regularly. It can accommodate two smaller people for occasional use but is not a comfortable regular couple's sleeping size. A queen at approximately 152 centimetres wide is the practical minimum for most couples.
What is the difference between a single and a super single?
A standard single is approximately 91 centimetres wide. A super single is approximately 107 centimetres wide, 16 centimetres wider. Both are 190 centimetres long. The extra width makes a noticeable difference to comfort for a solo sleeper who moves during the night.
Is a super single available at most Singapore mattress retailers?
Yes. Super single is a standard size in Singapore and is widely available. Bed frames, bedding, and accessories in super single dimensions are stocked by most local retailers.
What bedding do I need for a super single mattress?
Super single fitted sheets, duvet covers, and mattress protectors sized for approximately 107 by 190 centimetres. Super single bedding is widely available in Singapore.
Does a super single fit in most HDB bedrooms?
Yes. A super single fits comfortably in most standard HDB single bedrooms with adequate space around the bed remaining. It is a practical choice for smaller rooms where a double or queen would feel cramped.
Find the Right Mattress Size for Your Bedroom
Whether super single, single, or queen, getting the right size for your space and your sleep makes all the difference.
Browse the Somnuz mattress collection to explore options across all standard Singapore sizes. Or visit our showroom in Singapore for practical guidance on what suits your home.