Chef hats are graded. The standard for chefs to wear hats: the higher the skill, the higher the hat. Chef's hat is generally about 29.5 cm high. Both the chef and the chef wear this kind of hat. Chef's hat is basically the same as chef's hat, but the height is much lower and the cap pleats are less. Chef's hat basically has no height and few wrinkles. The more wrinkles on the chef's hat, the higher the grade.