size: 16mm, 18mm
Tips: 1cm = 0.3937inch
About color&size difference: According to the light and different computer monitor, the color may be slightly different as pictures. Besides, please allow 1-3cm measurement differ due to manual making. Your understanding and support are highly appreciated.
Email email@example.com if you have anything you do not know about the order
Dear customer Please carefully measure your size before you buy the product.
Youvimi COMMITMENT: We have complete return and replacement policy, we insist that The customer's interests is most important, your satisfaction is our greatest happiness. Please feel free to buy our product.