King size mattresses
If it’s a king size mattress you’re after, our range of perfectly proportioned mattresses offer a little extra room to luxuriate in. Feather & Black offer a range of styles from pillow top to zip & link, all of which offer cushioned, comfortable support for a great night’s sleep. We also offer a range of king beds to accompany our king size mattresses.
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Bestseller
Bestseller
Chaucer Mattress
King
20%
Off £1,699 from £1,359 -
Bestseller
Bestseller
Conrad Mattress
King
20%
Off £3,499 from £2,799 -
Medway Mattress
King
20%
Off £1,899 £1,519 -
Regency Kingsbury Mattress
King
20%
Off £2,999 £2,399 -
Flaxby Platinum Solstice Mattress
King
20%
Off £6,999 from £5,599 
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Bestseller
Bestseller
Owen Mattress
King
20%
Off £2,699 from £2,159 -
Regency Kingston Mattress
King
20%
Off £3,999 £3,199 -
Flaxby Platinum Lunar Mattress
King
20%
Off £4,999 from £3,999 -
Coleridge Mattress
King
20%
Off £3,999 from £3,199 -
Vispring Hartley Mattress
King
20%
Off £9,999 £7,999 -
Flaxby Platinum Eclipse Mattress
King
20%
Off £5,999 from £4,799 -
Ribble Mattress
King
20%
Off £2,299 £1,839 -
Vispring Heybrook Mattress
King
20%
Off £7,999 £6,399 
20% offselect luxury mattresses-
Severn Mattress
King
20%
Off £2,299 £1,839 - Witham Mattress King £1,899
- Boulton Mattress King £1,899
- Bestseller Bestseller Winwood Mattress King £1,099
- Bestseller Bestseller Tennyson Mattress King from £2,299
- Bestseller Bestseller Thames Mattress King £1,599
- Bestseller Bestseller Fitzgerald Mattress King from £2,999
- Bestseller Bestseller Walters Mattress King £1,499
- Swindale Mattress King £2,499
- Arlen Mattress King £2,099
- Byron Mattress King from £4,499
- Belvoir Mattress King £899
- Elsham Mattress King £999
- Harewood Mattress King £799
- Regency Topper King £999
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Hypnos Organics 2 Mattress
King
20%
Off £4,999 from £3,999 -
Hypnos Organics 3 Mattress
King
20%
Off £5,499 from £4,399 -
Hypnos Organics 4 Mattress
King
20%
Off £5,999 from £4,799 -
Hypnos Organics 6 Mattress
King
20%
Off £6,999 from £5,599
Need help choosing?
Take a look at our mattress guides.
King size mattresses are 5 foot wide and 6 foot 6 inches long, which is the same as W150cm x L200cm. A king mattress is 3 inches longer than a double mattress, so if you’re over 6ft tall the extra length will ensure you have a good amount of space to sleep comfortably.
The craftsmanship that goes into making our king size mattresses, alongside the luxurious materials and fillings used, ensures the high quality of our king mattresses. The quality of your mattress is crucial in determining how well you sleep, so it’s important to make sure yours is comfortable, supportive and durable. We do offer mattress trials on all our mattresses to help you decide.
A pocket spring count is essential in ensuring your new pocket spring king size mattress provides you with a well-supported, heavenly sleep. King size mattresses have around 1,000-15,000 pocket springs to provide a blissful sleep each night.
Yes, king size mattress are 3 inches longer than a queen mattress. A queen mattress is the same size as a small double (4’ x 6’3/120cm x 190cm), so a king mattress is both wider and longer measuring 5 foot wide and 6 foot 6 inches long or W150cm x L200cm.
There are two mattress sizes that are bigger than a king size mattress, super king and emperor, both of which are available at Feather & Black. Both offer a superior sleeping space, with a super king mattress measuring 6 foot by 6 foot 6 inches, or 180cm x 200cm, and an emperor mattress measuring 6 foot 6 inches by 6 foot 6 inches, or 200cm x 200cm.