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The Dump has a diverse array of king size mattresses to make your master bedroom fit for a monarch. At 76 inches wide and 80 inches long, king mattresses provide plenty of space for two partners to lie comfortably together. With a range of innerspring, memory foam, hybrid mattresses and more from big brands like Consumer Digest and Aireloom at unbeatable discounts, you're bound to find the one you've been dreaming of.