Round beds work best in rooms with enough floor space to let the circular shape breathe. Because there are no corners, a round bed reads larger visually than a rectangular frame of the same width, so it suits open, symmetrical layouts more than tight box rooms.
Round bedding (fitted sheets and duvet covers cut for a circular mattress) is available from specialist suppliers, though many owners simply dress the bed with oversized flat sheets and layered throws instead. Either way, the round shape becomes the focal point of the room, so we'd recommend keeping the rest of the bedroom simple and letting the bed lead.