Brush up on your Latin with Marc Jacobs. These rings are only $3 each at the Marc by Marc Jacobs store, so you can definitely buy in bulk, and share with your girlfriends while adding some key Latin phrases to your vocabulary. My favorite phrase, not listed is, Noli Me Tangere.
Nemo Nisi Mors - No one but death shall part us
Veritas Inlustrat - Truth enlightens
Serva Me Serva Bote - Save me and I will save you
Inter Nos - Between us
Tibi In Omne Tempus - For you forever
Datum Amore Ad Defend - Given in love for protection