The best mattress for elderly person is between 10 and 15 inches (also depending on the height of the bed frame). This will allow them to get in and out of bed easily without having to strain themselves. It will also make it easier for them to move around in bed. With a taller height profile, make sure that your bed frame is the right height so that you won’t have to jump onto the bed. Likewise, if the bed height is too low, make sure your bed frame places your mattress at the optimal height to sit and stand up from.