Kendo Men Made of Synthetic Leather My younger sister used this from her high school entrance to her second year of university. The inner circumference is 66 cm. The length from the top of the men to where it's secured is about 17 cm. It has a 6 mm grid. The inside of the men's grill is black, which is very rare, and it was custom-made by a bogu (armor) shop. - Material: Synthetic Leather - IBB Thank you for looking.