In short: Two measurements determine the right Flannel fitted sheet: the mattress size and the pocket depth. Standard models reliably fit mattresses up to around 25 cm high. biberna’s Flannel quality weighs around 160 g/m² and is made from 100% cotton, fully finished in Germany. Shipping is always free with no minimum order value.
A Flannel fitted sheet is probably the coziest way to cover your mattress – provided that the size and pocket depth really suit your bed. If the sheet is too loose, it will wrinkle at night and slip at the corners; if it is too tight, it will pop off when you turn over. As the inventor of Biber bedding (brushed cotton flannel), we will show you which sizes are available for Flannel fitted sheets, what you need to pay attention to regarding the pocket depth, and why Flannel quality is particularly worth it for fitted sheets.
What sizes are available for Flannel fitted sheets?
Fitted sheets are based on standard mattress sizes and usually cover an entire size range with an elastic all-round band. Typical classifications are:
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90 × 190 to 100 × 200 cm – for single beds and the classic standard mattress.
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120 × 200 to 140 × 200 cm – for wide single beds and narrow double beds.
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160 × 200 to 180 × 200 cm – for double beds and box-spring mattresses.
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200 × 200 cm and larger – for extra-large sizes and wide box-spring beds.
Because a good fitted sheet is elastic, one size usually fits an entire range – so a 90–100 × 190–200 sheet fits both 90 × 200 and 100 × 200. If you are unsure about your bed’s basic dimensions, our guide to bedding sizes will help you. You can find an overview of all available sizes directly in the Flannel fitted sheets category.
Pocket depth: Why mattress height matters
The length and width of a fitted sheet are only half the story – the pocket depth is at least as important. It describes how far down the sides the sheet can be pulled, i.e. how high the mattress can be while the sheet still securely fits.
As a rule of thumb: measure the height of your mattress at its thickest point – including a topper if applicable. Standard fitted sheets reliably fit mattresses up to around 25 cm high. If you have a particularly high mattress, a box-spring bed, or a thick topper, you should look for a model with a greater pocket depth so that the sheet does not pop off even under pressure. Important: A properly pre-shrunk sheet – as guaranteed by our full-finish manufacturing in Germany – retains its fit even after many washes and will not suddenly slip because it has shrunk.
Tip: An all-round sewn-in elastic band holds significantly better than elastic only at the four corners. So when buying, pay attention not only to the number but also to the workmanship.
➜ Secure the right format now: In our Flannel fitted sheets collection, you will find the cozy original Flannel quality directly from the manufacturer.
Why Flannel is particularly convincing when it comes to fitted sheets
At around 160 g/m², Flannel is noticeably denser and fluffier than a smooth percale sheet. That is exactly what makes a Flannel fitted sheet so pleasant in winter: The brushed cotton surface feels warm as soon as you lie down, instead of cool and smooth. You are not lying on a cold sheet, but on a soft, temperature-regulating surface made from 100% cotton.
Because Flannel is made from pure natural fibers, the quality is also breathable and absorbs moisture well – a clear advantage over many synthetic fiber sheets. You can read more about its properties in our article What is Flannel bedding?. If you would like to combine the sheet with matching bedding, you will find the corresponding Flannel bedding in many designs.
A word on price: For cost reasons, traditional retailers have often replaced high-quality Flannel products with cheap alternatives. As the inventor of Biber bedding (brushed cotton flannel), we offer you the original quality directly – at a fair manufacturer’s price. This way, you get a real Flannel feel, not just a label.
Care & combination – explained briefly
A Flannel fitted sheet is uncomplicated: As a rule, you wash it at 40 to 60 °C, which even makes it feel slightly softer. You should avoid fabric softener so that the fibers remain fluffy and absorbent. We provide detailed instructions in the 7 professional tips for washing and care. And if you would like to understand how fitted sheets and top sheets work together, it is worth taking a look at our Flannel fitted sheet and sheet guide.
Frequently asked questions
What size do I need for a 140 mattress?
For a 140 × 200 cm mattress, choose a fitted sheet in the 140 × 200 cm range. Thanks to the elastic all-round band, it will fit without wrinkles even with small dimensional deviations.
How high can my mattress be for a standard fitted sheet?
Standard models reliably fit mattresses up to around 25 cm high. For higher mattresses, box-spring beds, or thick toppers, measure the total height and choose a sheet with a correspondingly greater pocket depth.
Does a Flannel fitted sheet shrink when washed?
Because our products are fully finished and pre-shrunk in Germany, the fit is preserved. Wash as instructed and avoid excessively hot dryer settings, and the sheet will retain its fit.
How do I measure the right pocket depth for my fitted sheet?
Measure the height of your mattress at its thickest point, including a topper if applicable. This value is the pocket depth that your sheet must cover at a minimum. For box-spring beds or thick toppers, add up the total height and choose a model with a correspondingly greater pocket depth so that the sheet does not pop off.
How do I properly wash a Flannel fitted sheet?
As a rule, you wash a Flannel fitted sheet at 40 to 60 °C, which even makes it feel slightly softer. Avoid fabric softener so that the fibers remain fluffy and absorbent, and avoid excessively hot dryer settings. This way, the fit is permanently preserved.
The most important things in brief
- Thanks to the elastic all-round band, fitted sheets each cover an entire size range, such as 90 × 190 to 100 × 200 cm.
- Standard fitted sheets reliably fit mattresses up to around 25 cm high – above that, you need a greater pocket depth.
- Flannel is denser and fluffier than smooth percale at around 160 g/m² and is made from 100% cotton.
- An all-round sewn-in elastic band holds better than elastic only at the four corners.
- Wash at 40 to 60 °C without fabric softener; shipping is always free with biberna, with no minimum order value.
➜ Conclusion: Measure the mattress size and height, then choose the size and pocket depth accordingly – and your sheet will fit wrinkle-free night after night. You can find the cozy original quality in the Flannel fitted sheets collection, and the matching accessories in the entire bedding range – directly from the inventor of Biber bedding (brushed cotton flannel), always.
