... , 6.6''~8.1''Color: whiteFeatures:1. Good anti-static function with resistance107~108 Ω,2. All parts of the sole area ... Good wearability, comfortable, deft, firm, weather proof Application:Can be used for electronic, optical instrument, pharmacy, microbial engineering, precision instrument, etc ... place with plugging in soft things ( cloth or paper). cleanroom used 4- holes ESD shoes / antistatic shoes