Kumisizer (&trade;): The Kumihimo Braid Diameter Sizing Tool (Set of 2) KumiSizer answers the question "what is my braid diameter?" Hole sizes from 3mm to 12mm 3x3 inch 30mil sturdy plastic card Set of 2! One for home, one for travel, or share with a friend Determines what size end cap you need for your finished kumihimo braid