Call 01772 786 666 to speak us directly
Or complete our Enquiry Form
One of the most common questions we’re asked is a simple one: will it fit? Whether you’re learning how to measure for a mattress for the first time, or checking measurements for a made-to-measure bed, taking the time to measure properly makes all the difference. A well-fitted mattress sits neatly within your bed frame, supports you evenly from edge to edge, and helps the mattress wear as it should over time.
At The Odd Company, we make mattresses to order. That means we can work to standard UK sizes or build to your exact measurements. Either way, good measuring is the starting point. We build to the measurements you give us. That means accurate measuring at the start leads to better comfort, fewer surprises on delivery, and a mattress that feels made for your room, because it is.
Measuring doesn’t need to be complicated or technical. It just needs a little care, a tape measure, and a few quiet minutes. Before you start measuring, make sure you have clear access to the bed or space, a reliable tape measure, and somewhere to note things down. Measuring in centimetres is always best, as it avoids rounding errors and gives us the clearest picture when we come to make your mattress.
It’s also worth deciding what, exactly, you’re measuring. You might be replacing an existing mattress like-for-like, fitting a new mattress into an existing bed frame, or planning a new bed and mattress together. If there’s any doubt, measuring the internal dimensions of the bed frame itself is usually the most accurate approach. Mattresses can relax, compress and change shape over time, so they’re not always the best reference point.
If your bed frame was designed for a UK standard size, measure to confirm it still matches:
Record both measurements in centimetres. Example: 150cm (width) × 200cm (length) = UK King
If your measurements are within a few millimetres of a standard size, that’s completely normal.
For more help on sizes, use our mattress size guide
Older beds, antique frames, alcoves and awkward rooms often need a little more precision. This is where made-to-measure mattresses really come into their own.
For rectangular bed frames, measure the internal width and internal length carefully, checking each measurement twice. We usually recommend allowing a small clearance, around a centimetre overall, so the mattress sits comfortably within the frame without forcing it into place.
Four-poster beds and framed beds with internal posts need a little extra detail. In these cases, we’ll usually need the internal width and length of the bed, along with the width and depth of the posts and the internal corner angle (most commonly 90 degrees). If the posts aren’t uniform, measuring each one individually is absolutely fine. It’s more common than you might think.
If your bed has cut corners, curves or unusual shapes, don’t worry. We make mattresses with cut-outs, rounded corners and notches all the time. A simple hand-drawn sketch with measurements clearly marked is perfect. It doesn’t need to be architectural, pen and paper is ideal.
Older beds, antique frames, alcoves and awkward rooms often need something more precise. That’s where made-to-measure comes in.
Depth doesn’t affect the fit inside the frame, but it does affect how your bed looks and feels – especially with headboards, sheets and valances. Our mattresses range in depth depending on the model and natural fillings used. If you’re unsure what depth will suit your bed or room, we can advise.
Our mattresses are handmade with natural fillings like wool, cotton and horsehair. Because of this, slight variations can occur (usually within ±2cm). This is completely normal and a sign of natural, breathable materials doing their job. If you’re working with a very tight frame or fitted surround, tell us – we’ll guide you.
If your home has narrow staircases, tight corners or awkward access, a zip & link mattress can make life much easier. These mattresses are made in two halves, allowing them to be carried upstairs and into position with less fuss, before being securely zipped together on the bed.
1. Measuring the old mattress instead of the bed frame
2. Using inches and rounding up or down
3. Forgetting internal posts or rails
4. Guessing (tempting, but risky)
That’s not a problem. We regularly make mattresses to bespoke sizes, including extra lengths, wider widths and unusual shapes. We also make EU mattresses and US mattress sizes as part of our standard size range.
Yes. A small amount of clearance helps the mattress sit comfortably within the frame and makes it easier to fit bedding.
If something doesn’t feel quite right, get in touch before ordering. We’re happy to sense-check measurements or talk things through.
