Description Size 10-18cm/3.9-7inch (This is only available in white, not in black.) 17-30cm/6.6-11.8inch 20-30cm/7.8-11.8inch 20-35cm/7.8-13.7inch 25-35cm/9.8-13.7inch 28-42cm/11-16.5inch 32-45cm/12.5-17.7inch 35-50cm/13.7-19.6inch 38-51cm/14.9-20inch 40-55cm/15.7-21.6inch Size pure manual measurement with slight error. Dear friend, if you have any questions, please contact me first. I will sure do my best to solve!