Probably about a size ten.  Gorgeous!
This ring is beautiful and very interesting.  The alexandrite is an especially nice stone.  The way the ring Flips is super cool and innovative.  It's a bit big for my hands and no way to order a size that would be comfortable, and it arrived needing a good cleaning--something gray stuck on it here and there.  The gift box it came in is pretty.  It is always interesting receiving a package from a foreign country! Order this with confidence but maybe be prepared to give it a cleaning before you gift it.
Rating: 5 stars