b'Shamrock Pendant Small Signet Ring25.44mm x 20.65mm x 2.32mm Sizes J 1/2 - Q; 8.26mm x 11.49mmTrinity Pendant Medium Signet Ring26.36mm x 25.85mm x 1.88mm Sizes O - T 1/2; 11.65mm x 16.05mmCladdagh Pendant Large Signet Ring26.72mm x 21.75mm x 1.72mm Sizes Q - V 1/2; 13.40mm x 14.49mm6'