Size6: Diameter 16mm

Size7 : Diameter 17 Mm

Size8: Diameter 18mm

Size9: Diameter 19mm

Size10 : Diameter 20 Mm

Size11: Diameter 21 Mm

Size12: Diameter 22 Mm

Note: 

1. Please note that the photo does not show the actual size, please check the description to see the size details. 

2. Allows differences of 1 to 3mm due to manual measurement, thanks. 

3 Due to the difference between different monitors, the picture may not reflect the actual color of the item. 

4 Due to the difference of light and screen settings, the item's color may be slightly different from the pictures. 

There may be a slight difference in dimension due to different manual measurements.