Abstract: A convertible jacket is provided that can be easily converted between a single breasted configuration and a double breasted configuration. The jacket includes a jacket body having a front median opening defined by opposing vertical edges which are continuous with a horizontal edge at the top of the back of the jacket body. The jacket further includes a jacket dickey model which is attached to the jacket body along the opposing vertical edges and horizontal edge defining the median opening of the jacket body. The jacket dickey model may include a single breasted collar and an edge-to-edge jacket closure to form a single breasted jacket, or may include a double breasted collar and an overlapping jacket closure to form a double breasted jacket. Preferably, the jacket dickey model is attached to the jacket body by a continuous attachment device, such as a zipper.