Firm King Matress. Measuring 76 wide and 80 long a king size mattress provides plenty of space for a couple to sleep comfortably. Before you buy a firm mattress it helps to know how mattresses are rated on a scale of firmness.
Firm beds provide great support for back and stomach sleepers with just enough give to accommodate most side sleepers. Measuring 76 wide and 80 long a king size mattress provides plenty of space for a couple to sleep comfortably. What to know about firmness ratings.
Mattresses are rated on a scale of 1 to 10 for their firmness.
The firmness scale ranges from one to 10 with firm mattresses typically placing at eight and above. The firmness scale ranges from one to 10 with firm mattresses typically placing at eight and above. Not every bedroom can fit a king mattress so be sure to measure that the king mattress size is not too big for your sleeping space before getting your heart set on one of the many king bed mattress options available. The firm king size mattress which measures 76 wide by 80 long is roomy enough for a couple to sleep comfortably with space to spare.