Note that this is a size 6.5 ring (US/Canadian size) and the ring to be shipped.

Small green Gaspeite gemstone ring set in sterling silver

Approximate stone measurements: 10 mm x 8 mm
weight 2.8 grams
code Z4

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

Note that you can find other charts on google