The Collegiate Standard Phi Sigma Sigma Sorority Sterling Silver Infinity Ring A charming and dainty Phi Sigma Sigma sorority inspired infinity ring made by The Collegiate Standard Materials: 925 Sterling Silver - Rhodium Finishing Officially Licensed Product - passed through examination and requirements by the Sorority. In addition, part of the sales proceeds goes back to Phi Sigma Sigma Available in sizes 5 6 7 8 9 / select in drop down menu The perfect gift for Initiation, Graduation or for the Holidays!