Inflatable mattresses are available in all sizes from twin to king-size air mattresses. With bloated sides, inflatable beds may not be totally true to size. This could be frustrating when trying to outfit yours with a fitted sheet.
Don’t overlook height before making your purchase. Low mattresses are convenient for especially tight spaces and are easy to move and store. But they can be hard to get in and out of, and potentially less comfortable. For an added layer of comfort and improved mobility for older folks or those with back or joint pain, opt for a mattress that sits higher—18 inches or so.