902s ARMOUR Bicycle Helmet Urban helmet worn like a hat Fashion Helmet Adult Helmet Public Helmet Children Helmet Electric Kickboard Helmet

We will tell you how to measure the size.1. Select the largest size by checking the circumference of the head several times with a tape measure centering on the highest part of the forehead.2. If you have an Asian head (if you have a large side head), choose a size that is 1-2cm larger than the checked size.3. This is the size of our product.Persona-B(PB10) & ARMOUR M : 55~58cm , L : 59~62cmPersona-S(HS10) M : 54~57cm, L : 58~61cm—--------------------------------------------------Head left and right inner diameter measurement method1. Using a sliding door, put the head between the doors, remove the head, and measure the distance between the door gaps.2. This is the left and right inner diameter size of our product.Helmet Diameter (Head Size)Persona-B M : 180 mm (~172 mm)L : 183 mm (~175 mm)* Hat thickness about 7mmARMORM : 176 mm (~173 mm)L : 180 mm (~177 mm)