The Cose Round Button, 13mm in diameter and white, is a four-hole round button, 13mm in diameter, an intermediate size suitable for both shirts and blouses made of slightly thicker fabric. It is one of the most versatile sizes in the Cose round button range, balancing visibility and discretion on the garment, and is easy to sew by hand or machine on any sewing or garment repair project. White is one of the most sought-after colors for dress shirts and formal wear, making it an indispensable basic in any well-equipped sewing box.