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82 Products
Rackhams Cooltouch Plus Max-Coil Pocket Spring Mattress - 18cm Deep, Medium Firm - White - 1 - 5ft King Mattress Size…
DS Living King Size Pureflex Orthopaedic Memory Foam Mattress 5 inch - White - Wilko
Starlight Beds Hybrid Spring & Memory Foam Mattress Soft Firmness Durable Surface in White - Size: King
Starlight Beds
Starlight Beds Lunar Luxe Hybrid Mattress Soft Feel Memory Foam & Spring Support in White - Size: King
Starlight Beds
eXtreme Comfort Ltd Galaxy Memory Foam 22cm Deep Spring Tufted Mattress in Grey - Size: King
Extreme Comfort Ltd
eXtreme Comfort Ltd Ocean Memory Foam Spring Mattress in Bright Blue - Size: King
Extreme Comfort Ltd
Starlight Beds Galaxy Tufted Memory Foam Hybrid Spring 21cm Deep Mattress in White - Size: King
Starlight Beds
Starlight Beds Waterproof Mattress Durable Easy Clean PVC Coating Sprung Support in Blue - Size: King
Starlight Beds
eXtreme Comfort Ltd Sleep-Fusion Hybrid Mattress 20cm Deep Plush Feel Cooltouch Breathable in White - Size: King
Extreme Comfort LtdKing Size Mattresses: Your essential buying guide
A standard UK king size mattress is usually 150 x 200 cm. Always check the product dimensions against your bed frame, as European king sizes and some branded frames can differ.
A king size mattress gives two sleepers more width and length than a standard double, which can help if you feel cramped or are easily disturbed by movement. A double may still suit smaller bedrooms where floor space is limited.
Firmness depends on sleep position, body weight and comfort preference. Side sleepers often look for cushioning around the shoulders and hips, while back and front sleepers may prefer more support to keep the body aligned.
Pocket sprung, memory foam, hybrid, latex and open coil designs can all work well in king size. Compare the support system, comfort layers, depth, firmness and whether the mattress helps reduce partner movement.
Measure stair turns, doorways and landing space before buying, especially for deeper or non-rolled mattresses. Rolled or vacuum-packed king size mattresses can be easier to manoeuvre, but you should still check the stated packaging dimensions where available.
Somnior Alovera Sprung Memory Foam Medium Mattress in White - Size: King
Somnior
eXtreme Comfort Ltd Cool Touch Hand-Tufted with Memory Foam & Spring with White Border Mattress - Size: King
Extreme Comfort Ltd
Starlight Beds Sleep Warmer Premium Hybrid Mattress 20cm Deep Dual Comfort Fillings in White - Size: King
Starlight Beds
Starlight Beds Victoria White Castle Hybrid Mattress Memory Foam & Spring Support - Size: EU King
Starlight Beds
Starlight Beds Premium Comfort Bubble Hybrid Mattress 23cm Deep Soft/Medium Firmness in Grey - Size: King
Starlight Beds
Somnior Memory Foam Quilted Sprung Mattress Medium Feel in White - Size: King
Somnior
Aspire Cool Touch Classic Bonnell Roll Mattress in White - Size: King
Aspire
Sareer 6 Inch Cool Blue Memory Foam Mattress 5FT White King
Sareer Furniture
eXtreme Comfort Ltd Orthopaedic Firm Support Foam Mattress 14cm Deep Cooltouch Plus Cover in White - Size: King
Extreme Comfort Ltd
Somnior Pure Relief Memory Foam Rolled Mattress in White - Size: King
Somnior
Catherine Lansfield Bonnell Luxe Memory Foam Hybrid Mattress in White - Size: King
Catherine Lansfield
Aspire Heritage Comfort 1000 Pocket Wool Hybrid Mattress Medium Firm 23cm in White - Size: King
Aspire
Aspire PureRest Wool Hybrid Mattress Medium Firm 1000 Pocket Spring 23cm in White - Size: King
Aspire
Somnior Pocket Spring Memory Foam Mattress With High Density Modified Polyether in White - Size: King
Somnior
Somnior Midnight Orthopaedic Mattress Built with Extra Hybrid Support Features in White - Size: King
Somnior
Sliding Wardrobes 4U High Density Multi Layer Hard Foam Mattress - King 150cmx200cm in White
Sliding Wardrobes 4u
MN Furniture Multi-Layer High Density Hard Foam Mattress King Size W150cm x 200cm x H24cm in White
Mn Furniture
Knight Sleep Stressfree Semi Ortho Dual Sided Mattress in White - Size: King
Knight Sleep
Dreams Workshop Carty Traditional Spring Mattress - 5'0 King
Dreams Workshop
Sareer Pocketo 2000 Pocket Sprung Gel Foam Mattress 5FT White King
Sareer Furniture
Nexus Mattresses Ltd Hybrid Harmony Pocket Spring Mattress in White - Size: King
Nexus Mattresses Ltd
Rackhams Cashmere 2000 Memory Foam Pocket Spring Mattress - 25cm - King
Somnior Washington 3000 Hybrid 5 Layer Memory Mattress 9 Zone Support in White - Size: King
Somnior
Living and Home Ergonomic Quilted Pocket Spring Mattress for Pressure Relief in White - Size: King
Living And Home
Sareer Furniture Limited Latex Foam Mattress in White - Size: King
Sareer Furniture Limited
Somnior Hybrid Memory Foam Pocket Spring Mattress Designed For The Ultimate Sleep, Breathable With Back Support in White…
Somnior
Sareer Matrah King Size Pocketo 1000 Latex Foam Mattress - Grey - Wilko
Sareer
Somnior Medium Firm Hybrid Mattress 29CM - Cooling Wool & Memory Foam in White - Size: King
Somnior
Somnior Elizabeth Two Sided Medium Soft & Medium Firm Mattress Natural Fillings in White - Size: King
SomniorShowing 50 of 82
A king size mattress can make a bedroom feel more comfortable and generous, but the best choice depends on your bed frame, sleep style and preferred feel. Use ShopSmarty to compare options and spot sales across suitable king size mattresses.
Start by confirming that you need a UK king size mattress, usually 150 x 200 cm. If your bed frame was bought abroad or described as European sized, the dimensions may not match a standard UK king.
Also consider mattress depth. A deeper mattress can change the height of your bed and may affect fitted sheet compatibility, bedside table reach and how easy it is to get in and out of bed.
King size mattresses come in a range of constructions, including pocket sprung, memory foam, hybrid, latex and traditional sprung designs. Pocket springs can offer more independent support, while foam layers often provide a more contouring feel.
If two people share the mattress, look closely at motion isolation, edge support and firmness. These details can matter more on a larger mattress because each sleeper may have different comfort needs.
Side sleepers commonly prefer a mattress with enough give to cushion pressure points. Back sleepers often look for balanced support, while front sleepers may need a firmer feel to help prevent the hips from sinking too far.
If you and a partner prefer different firmness levels, compare medium or medium-firm king size mattresses, as these can offer a practical middle ground for shared beds.
A king size mattress offers more sleeping room, but it also needs enough floor space around the bed. Check that drawers, wardrobes and doors can still open comfortably once the bed is in place.
For compact bedrooms, measure the full footprint of the bed frame rather than the mattress alone, as divans, ottoman bases and statement frames can add extra width or length.
When browsing king size mattress deals, compare like for like: size, construction, firmness, depth, materials and included features. A lower price may not be the best value if the support or dimensions do not suit your bed.
ShopSmarty helps you review sale options in one place, making it easier to narrow down king size mattresses that fit your room, comfort preferences and budget.
Use our barcode scanner to match products instantly to find the best prices, find products with ease using our voice search and build wish lists and your favourites at the click of a button.
