Cut away collar - A shorter collar with a wider space between the collar tips, the tips cut away from the shoulders instead of pointing down as on a classic shirt collar. With a horizontal line is this collar best suited for wide or large tie knots
Extreme cut away collar - A longer collar with an even wider gap between the tips than the regular cutaway. The tips cut away and follow the angle of the shoulder. Suitable for wider ties and lapels.
Slim fit - Fits close to the body, with a tighter arm and a more tapered shape at the waist than the Regular fit. Suitable for a slim body shape.
Regular fit - Or Classic fit, has a looser design around the arms and chest for comfort and movement. The fit around the waist is straighter and longer than Slim fit. Suitable for most body shapes.