Amazon.com: ALANOOY CS2.62mm NBR X Ring 5PCS ID 61.6/63.17/67.95/69.52/71.12/72.69X2.62mm Double Acting Seal X-Seals Quad Ring AS568 Standard XRing (Size : ID72.69x2.62mm) : Industrial & Scientific
Find Your Ring Size — Rowe
How to Find a Woman's Ring Size (Even Without Her Knowing)