1.Jacket Style: Double Breasted vs Single Breasted
Double Breasted: 6 buttons, Wider overlap, 2 parallel rows of buttons. More formal.Single Breasted: 2 buttons, narrow overlap of fabric. More casual.
2. Vent Style
Italian - No vent, suited for more smaller, petite physiques.
American - Single vent, suited for individuals with larger buttocks.
English- Double vent, suited for taller men.