Mattress Size Guides

Welcome to our comprehensive mattress size guide, designed to help you find the perfect fit for your bed. Whether you're upgrading your mattress or selecting a new one, understanding mattress sizing is crucial for ensuring comfort and a seamless fit in your bedroom. This mattress sizing guide provides you with essential information on bed dimensions in the UK, making it easier to choose the right mattress for your space or create a bespoke mattress using our builder.

When selecting a mattress, it’s important to measure your existing mattress or bed frame to guarantee the best fit. Our guide will walk you through the steps of measuring your mattress and offer advice on selecting the appropriate thickness to match your needs. With our clear and concise mattress size guide, you'll be well-equipped to make an informed decision, ensuring a comfortable and restful night's sleep every time.

How do I measure my new mattress?

To get the most accurate measurement, we recommend measuring your existing mattress in order to make sure that your new mattress will fit snugly into the space. If this is not possible, measure the bed frame or base surface but please make note of the below when doing so!

If your mattress is placed on a base without any surrounding structure, it's important to measure the full dimensions of the base to ensure that the mattress adequately covers all sides of the bed.

If your mattress is situated within a bed frame or nestled between two walls, it is advisable to ensure a modest 1cm gap on either side. This slight allowance will provide ample space for tucking in your bed sheets.

What thickness is right for me?

If you have no restrictions on the height your mattress can be, then the thicker the better. With our 25cm models, we use a deeper layer of the comfort foam to add to the luxury with more supportive foam underneath so your mattress supports you, for longer!

Choosing the right mattress thickness is crucial for comfort and support. The ideal thickness depends on several factors, including your body weight, sleeping position, and personal preference.

For a Plush Feel: If you prefer a plush, luxurious feel, a thicker mattress, around 25cm or more, is ideal. Thicker mattresses generally have additional layers of comfort foam, providing extra cushioning and support, which is perfect if you enjoy sinking into your mattress slightly.

For a Firmer Feel: If you prefer a firmer sleeping surface or have height restrictions, a thinner mattress, such as a 14cm option, may be more suitable. Thinner mattresses can still offer excellent support, especially when made with high-density foams like our Reflex foam, which maintains firmness while providing adequate pressure relief.

For Specific Needs: If you have specific requirements, such as limited space or the need for easy manoeuvrability, thinner mattresses are a great option. They’re also ideal for bunk beds, trundles, or beds with adjustable bases.

The right thickness can significantly impact your sleep quality, ensuring you wake up refreshed and well-supported. At Custom Mattress, we offer a range of thickness options and mattress toppers, allowing you to choose the perfect balance of comfort and support for your individual needs.

What about if I am restricted in the height I can have?

If you do require a thinner mattress, we can make our Reflex model with no comfort layer to 6cm deep. Please see our thickness recommendations below:

14cm or less: Upgrade to a firm feel for improved support and firmness (Upgrading is free of charge!)

Mattress Depth Ranges

The cost of the comfort layer will depend on the actual depth of your mattress:

Comfort Layer Type Min Depth Max Depth
Memory 10cm 20cm
Gel 10cm 25cm
Cool 10cm 25cm
No Comfort Mattress 6cm 15cm

Bed Dimensions UK

Understanding bed dimensions is essential when selecting the right mattress size for your space. In the UK, standard bed sizes range from compact options like Single beds to more spacious choices like King and Super King beds. Here’s a quick overview of the most common bed dimensions in the UK:

  • Single: 90cm x 190cm (3' x 6'3") – Ideal for children, teenagers, or smaller guest rooms.
  • Double: 135cm x 190cm (4'6" x 6'3") – A versatile size that works well for solo sleepers who enjoy extra space or for couples in smaller bedrooms.
  • King: 150cm x 200cm (5' x 6'6") – Offers more width and length, providing ample room for couples or taller individuals.
  • Super King: 180cm x 200cm (6' x 6'6") – The ultimate in luxury and space, perfect for couples who want maximum comfort.

When choosing a mattress, it’s important to match it to your bed’s dimensions to ensure a snug fit. For custom or non-standard sizes, our bespoke mattress builder allows you to create a mattress that fits your specific bed frame, ensuring comfort without compromise.

The Importance of Getting the Right Size Mattress

The size of your mattress plays a significant role in the quality of your sleep. A mattress that is too small can lead to discomfort, frequent waking, and restricted movement, especially if you're sharing the bed. For couples, a larger mattress like a King or Super King offers more personal space, reducing disturbances caused by movement during the night. If you tend to spread out while sleeping or share your bed with pets or children, opting for a larger mattress can make a noticeable difference in how well-rested you feel each morning. The right mattress size allows you to sleep more comfortably, providing the space needed to move freely and maintain a healthy sleep posture.

Custom Mattress Sizing

At Custom Mattress, we understand that not every space is designed for a standard-sized mattress. That’s why we offer custom mattress sizing through our bespoke mattress builder. Whether you need a mattress for an RV, a boat, or a uniquely shaped room, our custom sizing options allow you to create a mattress that fits perfectly in any space. 

You can customise the length, width, and thickness to suit your specific needs, ensuring that your mattress not only fits the dimensions of your bed frame but also provides the comfort and support you require. With custom sizing, you can finally achieve a perfect night’s sleep, no matter where you are.

Find Your Perfect Fit Today

Ready to upgrade your sleep experience? Explore our mattress size guide and use our bespoke mattress builder to create a mattress that perfectly fits your space and sleep needs. If you need assistance, our expert team is here to help, so get in touch today. Start your journey to better sleep with Custom Mattress today!