Most people get a new adjustable. This opens up your choices, and may make it easier for you to decide to buy based on features other than size.
Get the Right Size Box Spring Frame
Even though there are standard bed sizes from which you can choose, you still need to know your room dimensions. You should have about 2' to 3' clearance space on either side of the bed so that you can make the bed easily. If you have a bedspread, can add up to 3" on the top. So consider these factors when determining where your bed will be and what size bed frame to get. Nothing is worse than a bed that feels jammed into the corner.
Types of Full Size Box Spring Frames
There are a number of types of bed frames, from Captains beds have built in drawers underneath!