How to Measure an Adjustable Bed for Fitted Sheets That Actually Fit
If you have ever ordered fitted sheets for an adjustable or awkwardly sized bed and found them too loose, too tight or forever riding up at the corners, the problem is usually in the measuring. Knowing how to measure an adjustable bed for fitted sheets properly helps you avoid guesswork and gives you a much better chance of getting linen that fits neatly and stays in place.
At Bespoke Bed Linen, we provide bespoke made-to-measure bed linen and tailored bedding solutions for homeowners and businesses. We specialise in non-standard sizes and hard-to-fit beds, including adjustable beds, so we understand the small details that off-the-shelf bedding often ignores. This guide explains exactly what to measure, what to note and when a made-to-measure option is the sensible choice.
How to measure an adjustable bed for fitted sheets
What you will need
Before you start, gather a few basics so you can measure accurately and record everything clearly.
A tape measure
Something to write your measurements down
Clear access to the mattress edges
A second person if the mattress is heavy or awkward to handle
Measure the mattress rather than the bed frame wherever possible. It also helps to record everything in centimetres and take each measurement twice.
1. Measure the width
Measure straight across the mattress from side to side at its widest point. Keep the tape flat rather than curving it over the top. If your adjustable bed has two mattresses or split sections, measure each side separately rather than assuming both halves are identical.
2. Measure the length
Measure from the head to the foot of the mattress, not the outer base. For most orders, the mattress should be in its normal flat resting position when you take this measurement. That gives you the core size needed for fitted bedding.
3. Measure the depth carefully
Depth is one of the main reasons fitted sheets fail. Measure from the top sleeping surface down to the bottom edge of the mattress. If you use a topper all the time and want the fitted sheet to go over both layers, include it in the depth. If the topper is removed separately, note that as well.
On adjustable beds, extra depth can make the difference between a fitted sheet that stays in place and one that constantly pulls free, so this is never a figure to guess.
4. Note any split or moving sections
With adjustable beds, overall size alone is not always enough. Also record whether the mattress is:
One full mattress on an adjustable base
A split mattress with separate moving sides
A split-top design where only the upper section separates
Used with separate toppers or protectors on each side
This information helps determine whether a single fitted sheet is likely to work well or whether a more tailored solution is needed.
5. Record special shapes or awkward features
If your mattress has rounded corners, cut corners, unusual depth, retainers or any other feature that makes standard sheets slip or bunch, write that down. A clear photo can also help when discussing your requirements. With non-standard beds, those smaller construction details often matter just as much as the width and length.
Why adjustable and non-standard beds are harder to fit
Standard fitted sheets are made around standard assumptions. Adjustable beds often do not behave like a standard mattress once you factor in movement, depth and unusual construction.
The mattress may flex or move in sections
The depth may be greater than standard fitted sheet pockets
Split or paired mattresses may need separate consideration
Toppers can change the finished depth significantly
Unusual corners or edge shapes can stop a standard elasticated sheet sitting neatly
This is why people are often caught out even when the advertised mattress size looks close enough. A fitted sheet that is only slightly wrong can pull free at the corners, crease uncomfortably or wear more quickly because it is under constant strain.
A practical checklist before you order
If you are getting ready to order made-to-measure bed linen, sending clear and complete information from the start makes the whole process easier. It reduces back-and-forth and helps make sure the bedding suits the bed you actually have.
Write down the width, length and depth in centimetres. Double-check each figure.
Say whether the bed is adjustable. Mention if one or both sides move.
Note any split sections. Include whether the split is full length or only at the top.
Mention toppers, protectors or overlays. Say whether they need to be included in the fit.
Describe unusual shapes. Rounded corners or other awkward details can affect the final fit.
Share a photo if the bed is difficult to describe. A simple image can prevent confusion.
If you are unsure what matters and what does not, our adjustable and non-standard bed measuring service is designed to make the process clearer and more straightforward.
Common measuring mistakes to avoid
Even careful customers can miss important details on unusual beds. The most common issues are simple, but they make a real difference to the final fit.
Measuring the bed frame instead of the mattress. Linen fits the mattress, not the outer base.
Ignoring mattress depth. Width and length alone are not enough for fitted sheets.
Forgetting the topper. If it stays on the bed, it changes the measurement that matters.
Assuming both sides are identical. Split adjustable beds should be measured, not guessed.
Leaving out shape details. Non-standard corners and edge features can affect fit just as much as size.
Getting these points right the first time is often the difference between bedding that feels tailored and bedding that feels like a compromise.
When standard sizes stop working
Not every bed needs a custom solution. But if any of the signs below sound familiar, standard fitted sheets are probably costing you time and frustration.
The corners spring off during the night
The sheet covers the surface size but not the depth
The fabric bunches because the bed has a split or unusual shape
You keep trying different standard sizes and none fit properly
Your mattress, topper or adjustable sections do not match normal sizing
In those situations, bespoke bed linen is not about adding unnecessary extras. It is a practical way to get the right fit, reduce frustration and feel more confident that what you order will actually work on the bed you own.
How we help at Bespoke Bed Linen
Based at Melton Court, Kirkby Fleetham, Northallerton, Bespoke Bed Linen provides bespoke made-to-measure bed linen and tailored bedding solutions for homeowners and businesses. We specialise in non-standard sizes and hard-to-fit beds, including adjustable beds and other bespoke requirements.
We also work with hospitality clients such as hotels. Whatever the setting, our approach is practical and clear. We focus on straightforward communication and presenting product options and measurements clearly, so customers can order the correct items with confidence.
If you are unsure whether your measurements are complete, or you want to sense-check an awkward bed size before placing an order, it is worth speaking to us before you buy. It is often far easier to get clarity at the measuring stage than to try to solve a poor fit afterwards.
Frequently asked questions
Do I measure the mattress or the bed base?
Measure the mattress. The fitted sheet needs to grip the mattress shape and depth, so bed frame measurements can be misleading.
Should I include a mattress topper when measuring fitted sheets?
Include the topper if it stays on the bed and the fitted sheet needs to cover it. If you remove it separately, record the mattress depth on its own and mention the topper as an extra detail.
Can one fitted sheet work on a split adjustable bed?
Sometimes, but it depends on how the bed is built and how the sections move. A full split, split-top or paired mattress setup can all behave differently, which is why it helps to record the bed construction as well as the basic dimensions.
What if my bed is a non-standard size?
That is exactly when made-to-measure bedding becomes most useful. If standard sizes have been unreliable, send the exact width, length, depth and any shape details so the bedding can be matched to your measurements rather than a generic size chart.
What is the best way to enquire?
Phone is the preferred enquiry method. If you need help measuring your bed or want to discuss your dimensions, you are welcome to call us and talk through the details.
Get the right fit the first time
Learning how to measure an adjustable bed for fitted sheets properly helps you avoid the usual problems: loose corners, shallow pockets, bunching fabric and repeat orders that still do not solve the issue. The key is to record the full picture, not just a rough width and length.
If you need help measuring your bed, contact Bespoke Bed Linen to discuss your dimensions and find the right made-to-measure bed linen. Phone is the preferred way to enquire, so call us on 07860 547781, or visit our website to learn more.
