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267 Products
Linear Cool Touch Hybrid Mattress - 20cm Deep, Soft Firmness Grey King
Starlight Beds
Starlight Beds King Size Tufted Hybrid Memory Foam and Spring Mattress - Grey - Wilko
Starlight Beds
Rackhams Cooltouch Plus Max-Coil Pocket Spring Mattress - 18cm Deep, Medium Firm - White - 1 - 5ft King Mattress Size…
Summerby Sleep No. 9 Three Zone Memory Foam And Coil Spring Hybrid Mattress, King 150 X 200Cm
Summerby Sleep
eXtreme Comfort Ltd The Galaxy Modern Memory Foam Spring Mattress King Size
Extreme Comfort Ltd
Starlight Beds Hand Tufted Cooltouch Comfort Memory Foam Sprung Mattress King Size
Starlight Beds
DS Living King Size Pureflex Orthopaedic Memory Foam Mattress 5 inch - White - Wilko
Starlight Beds Grey Memory Foam Hybrid Sprung Mattress 5Ft King Size (150Cm X 200Cm)
Starlight Beds
Starlight Beds Hybrid Spring & Memory Foam Mattress Soft Firmness Durable Surface in White - Size: King
Starlight Beds
Rackhams Lunar Luxe Hybrid Mattress - Soft Feel, Memory Foam & Spring Support - Yellow - 1 - 5ft King Mattress Size…
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
eXtreme Comfort Ltd Hybrid Soft Feel Mattress Memory Foam & Spring Support Grey Mattress Uk Made 5Ft King Size 150Cm X…
Extreme Comfort Ltd
eXtreme Comfort Ltd Ortho Reflex Foam Mattress - 10Cm Deep - Firm Mattress - King Size
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 Ltd
Summerby Sleep Three Zone King Mattress Memory Foam & Coil Spring Hybrid Mattress, (150cm x 200cm), Comfy & Affordable,…
Summerby
eXtreme comfort ltd Flame Essentials Orthopaedic King Mattress 5 FT (150x200cm) - Firm Support Foam - Maximum Value…
Extreme Comfort Ltd
Summerby Sleep No. 9 Three Zone Memory Foam and Coil Spring Hybrid Mattress, King 150 x 200cm
Summerby Sleep
Wilson Beds Limited Wilson Beds - 5Ft King Size Superior Depth 9" Quilted Hybrid Spring Mattress With A Layer Of Memory…
Wilson Beds Limited
TeQsli Individually Pocket Sprung King Mattress 5FT with Soft Fabric, 9 Inch Hybrid Mattress King for Pressure & Back…
Teqsli
Rackhams Source 5 Contract Water-Resistant Mattress - Durable & Easy-Clean Design - Blue - 1 - 5ft King Mattress Size…
Novilla Mattresses King Size 9.8 Inch 3-Zone Gel Memory Foam Pocket Sprung Mattress, 5FT Hybrid Mattress Firm with…
Novilla
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
Rackhams Straight Line Hybrid Mattress - Memory Foam & Spring Support - White - 1 - 5ft King Mattress Size Mattress…
Starlight Beds Sleep Warmer Premium Hybrid Mattress 20cm Deep Dual Comfort Fillings in White - Size: King
Starlight Beds
Aspire Beds 3 Comfort Layers Aspire-Cool Touch Diamond Memory Foam & Bonnell Sprung Hybrid Mattress, Grey Hessian…
Aspire Beds
Bedz Online Bedzonline Air Feel Orthopedic Mattress, Memory Foam & Spring Hybrid, 5Ft King Size (150X200 Cm)
Bedz Online
TeQsli 5FT King Mattress, 10Inch Memory Foam Pocket Sprung Hybrid Mattress for Pressure Relief - Medium Firm…
Teqsli
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
Starlight Beds Signature King Size Memory Foam Pocket Sprung Mattress
Starlight BedsKing 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.
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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.
