Indicates how firm a mattress is on our scale from 1 to 10, where 1 is very soft and 10 is very firm. Adjustable bed frames will allow the head and foot sections to be raised and lowered ...

(This mattress size is also a bit more common ... which recommend at least 36 inches (or 3 feet) of space surrounding a bed. Twin Smaller or narrower rooms (say anything under 9 ½ by 7 ½ feet ...

When you buy through our links, Business Insider may earn an affiliate commission. Learn more A mattress size chart can help you pick the best mattress for your needs, depending on your room size ...