A one-piece collar which is turned down to form a continuous line around the back of the neck to the front.
A tuxedo collar in which collar is attached and rolled back in a smooth, rounded, continuing line along the neckline of the garment.
Rounded, continuous collar and lapel, without notch or peaked break. Favored for Dinner Jackets. If the lapel is wider over the body at the collar it is sometimes called a Roll Collar.
On a coat, there is no change from the collar to the lapel, it is a rounding continuation of the collar.
A combined lapel and collar where the collar is folded back against the garment.