18.5cm There may be signs of aging such as yellowing and damage. Please check the photos and thank you for your understanding. This is a used and old item, so there may be scratches, dents, stains, etc. that cannot be fully described or that have been overlooked. Also, please contact the administration or the shipping company regarding any damage that may occur during shipping. Returns and cancellations for the above reasons will not be accepted. Please refrain from purchasing if you do not understand. Thank you for your purchase with the above in mind.