King Size Fitted Sheets

A standard Belledorm king size fitted sheet (150cm x 200cm) fits a UK king size mattress measuring 150cm wide by 200cm long, the most popular larger bed size in the UK, found in master bedrooms and higher-end hotel rooms.

The fitted sheet's length and width dimensions are fixed to the mattress size. What varies is the depth, the box measurement that wraps under the mattress edge. Belledorm offers king size fitted sheets in 30cm (standard), 38cm (extra deep), and 46cm (ultra deep) depths to accommodate mattresses from standard models through to deep pocket sprung mattresses with toppers. Note that UK king size (150cm x 200cm) is a different dimension to US king size (193cm x 203cm) - a UK king size sheet will not fit a US king size mattress. If your mattress measures 180cm wide, you need the super king range, not king size.

A UK king size bed measures 150cm x 200cm (5ft x 6ft 6in). A super king measures 180cm x 200cm (6ft x 6ft 6in) - 30cm wider at the same length. The two sizes use different fitted sheets, flat sheets, and duvet covers, none of which are interchangeable.

The additional 30cm width of a super king provides each person sharing the bed with an extra 15cm of sleeping space - a meaningful difference in comfort for couples. Both sizes share the same 200cm length, making them equally suitable for taller adults. A king size fitted sheet will not stretch to fit a super king mattress and will pull free from the corners. If you are unsure which size your mattress is, measure the width: 150cm is king size, 180cm is super king.

For most couples, a king size bed (150cm x 200cm) is a significant comfort improvement over a double (135cm x 190cm), providing 15cm more width and 10cm more length.

The additional width gives each person sharing the bed approximately 7.5cm more sleeping space, which makes a noticeable difference to comfort - particularly for couples who move during the night or prefer not to sleep in close contact. The 10cm extra length is also beneficial for adults over 6ft who find a 190cm double mattress restrictive. The practical trade-off is floor space: a king size bed requires approximately 20cm more room width than a double, which matters in smaller bedrooms. Belledorm's king size range covers 118 products from Basics Polycotton from £12.50 through to 1200TC Cotton Sateen, the same full fabric range as the double size.

To fully dress a king size bed, you need a fitted sheet, a duvet cover, and at least two pillowcases. A flat sheet is optional but recommended for a layered or hotel-style finish.

The complete king size bed bedding list:

• Fitted sheet (150cm x 200cm) - in your chosen depth: 30cm, 38cm, or 46cm
• Duvet cover (225cm x 220cm) - sized for a king size duvet
• Pillowcases - standard UK pillow is 48cm x 74cm; two for a king size bed
• Flat sheet (275cm x 275cm) - optional, used between the fitted sheet and duvet
• Mattress protector (150cm x 200cm) - recommended to extend mattress life and add a hygiene layer
• Valance sheet - optional, used to conceal the bed base and divan legs for a neater finish

All items are available in matching fabrics and colours across Belledorm's king size range, making it straightforward to build a fully coordinated set.

Yes, UK king size bed sheet dimensions are standardised: fitted sheets are 150cm x 200cm, flat sheets are 275cm x 275cm, and duvet covers are 225cm x 220cm. Belledorm's king size range follows these standard UK dimensions throughout.

The critical caveat is that UK king size is not the same as US king size. US king size mattresses measure 193cm x 203cm, significantly larger than the UK standard. Always confirm you are purchasing UK-sized bedding. The fitted sheet depth is also not standardised and varies by product and brand - always check the box depth (30cm, 38cm, or 46cm) against your mattress measurement. If your mattress measures 180cm wide rather than 150cm, you need super king bedding, not king size.

Yes, UK double bed sheet dimensions are standardised: fitted sheets are 135cm x 190cm, flat sheets are 230cm x 275cm, and duvet covers are 200cm x 200cm. Belledorm's double range follows these standard UK dimensions throughout.

The one variable is fitted sheet depth, this is not standardised and varies by product and brand. Always check the box depth (30cm, 38cm, or 46cm) against your mattress measurement before purchasing. One common point of confusion is the duvet cover: a double duvet cover (200cm x 200cm) is square, not rectangular, this is correct and standard across the UK industry. If you are buying bedding as a gift or for a property you cannot measure, standard UK double dimensions apply to the overwhelming majority of double beds manufactured since 2000.

It depends on your mattress depth. Belledorm fitted sheets come in standard 30cm, extra deep 38cm, and ultra deep 46cm options. Measure your mattress before buying - if you use a mattress topper, add that measurement too. Most standard UK mattresses suit a 30cm sheet, but if corners keep popping off, go up to 38cm.

Percale has a crisp, cool feel, ideal if you sleep warm or love that fresh hotel sensation. Sateen has a smooth, silky finish that feels more luxurious but retains slightly more warmth. If you are unsure, percale is the safer all-round choice for most sleepers.

Not necessarily. A well-made 200 thread count in pure cotton will often outperform a cheap 800 thread count in lower quality fabric. What matters more is the fibre quality and weave construction. Belledorm's range runs from 200TC up to 1500TC, so there is something for every preference and budget.

The range covers everything from bunk bed and narrow single through to emperor and large emperor, including small double (4ft), standard double, king, super king, and IKEA Euro King. Special sizes are also available for non-standard mattresses including 6'6'' beds and super single.

Go for a percale weave in 100% cotton, it is breathable and gets crisper with every wash. The 200TC or 400TC Egyptian cotton options are particularly popular with warm sleepers. Avoid sateen or very high thread count options if you tend to overheat, as the denser weave retains more warmth.

Yes. The extra deep 38cm and ultra deep 46cm options are specifically designed for thicker setups. If you have a standard mattress plus a topper, the 38cm extra deep should cover most combinations. For particularly thick setups, the 46cm ultra deep is the safest choice.

Egyptian cotton has longer fibres, which means a softer, smoother feel that actually improves with washing rather than deteriorating over time. It is also more durable. Standard cotton is perfectly good quality for everyday use and comes at a lower price point, Belledorm's 200TC 100% cotton percale is a great example of quality without the premium price tag.

Yes. Belledorm stocks fitted sheets for a wide range of special sizes including narrow single, long single, long narrow single, bunk bed, 6'6'' beds, super single, and IKEA Euro King, alongside all standard UK sizes.

Yes, most Belledorm fitted sheets have a sample option available so you can feel the fabric quality before committing to a full set. Look for the "Sample Available" label on individual product listings throughout the range.

For winter, brushed cotton (flannelette) is the go-to choice, it has a warm, soft feel that is noticeably cosier on cold nights. For summer, a lightweight 200TC percale in pure cotton keeps things cool and breathable. You can filter by season directly on the fitted sheets page to narrow down your options quickly.