Suitable for Head Circumference: 53-58cm / 20.87-22.83in, great fit for most for head sizes. Occasions: for spring, fall and winter daily wearing, morning workout, outdoor activities, skiing, hiking Lamb Wool, extremely comfortable and soft and skin-friendly. Design: The round design at the top is more humane and fits the shape of everyone's for head. The external of lamb wool is comfortable and warm. Hat Texture: The furry lamb wool cotton of outside can offer you and long-lasting heat retention, and have amazing breathability for your for head.