Trying to match this size?
- If you like to work in inch sizes, 7:18 is the closest metal size match for C19 rubber.
- If you prefer to work in millimeters, 2.75M18 is the closest match.
The aspect ratio for C19 rubber rings is 2.62
inner diameter = 2.75mm (roughly 7/64″)
“wire” size = 1.05mm (0.041)
Happy (stretchy) chainmailling!