The ISO 3601 metric-size O-rings quickreference chart lists the O-rings in millimeters, with IDs from 0.74 to 658.88 mm, and cross sections (widths) from 1.02 to 6.99 mm The ISO 3601 metric-size ...
The AS-568* Standard O-Rings Quick Reference Chart lists every AS-568 Standard size O-ring — listed in inches, with inside diameters (ID) from 1/32 to 26 in., outside diameters (OD) from 3/32 to 26½ ...