At 150cm wide by 200cm long king size mattresses are designed to fit on UK standard king size bed frames. Here at BedzRus we have a wide range of cheap king size mattresses available, including standard sprung, luxury pocket sprung and memory foam mattresses. We have grouped all our mattresses into firmness categories for your convenience. Our range of king size mattresses include leading brands such as Sweet Dreams, Vogue Beds, Breasley and many more, all at very competitive prices which can assure great value. With our free pre-bookable delivery service, you can be assured of a speedy delivery time of your new mattress.