Note that this is a size 8 ring (US/Canadian size). This is a unique ring that will be the one shipped.

Black onyx ring set in 92.5 sterling silver, round shape

Stone size about : 8 mm

Code 624 grams

RING SIZE CONVERSION CHART LINK:
http://findmyringsize.com/en/conversiontable.aspx

Note that you can find other charts on google