The Slim Line is about 2 - 2 1/4 Inches high and creates an elongated butterfly shape. When worn, it spans the full length of the jaw. This is the considered the most classic bow tie shape and design.
The Small Slim is 1 3/4 - 2 inches high and forms a tight butterfly shape. This bow tie typically doesn't span the full length of the jaw and is more commonly worn by those with slender facial structure.