Phi Delta Kappa 14K yellow gold Fraternity Pin. Phi Delta Kappa is a US professional organization for educators. It was founded on Jan. 24th, 1906 at Indiana University. Measurements: 9/16" long by 1/4" wide Weight: 1.9 grams This pin is stamped on the back 14K & has a maker's hallmark. Overall this pin is in good used condition.