Is there a meaning to this symbol in the Sizing choice menu ?? http://malechastity-devices.com/ Thanks
yep, a O with a slash through is simply a "number zero". It's used in IT a lot as it prevents confusing the number 0 with a capital letter O or a letter o. o0O0o0O0o
The symbol used by red chili chastity is NOT an uppercase zero with a stroke, but the symbol for diameter: https://en.wikipedia.org/wiki/Diameter#Diameter_symbol You can choose between bars with 4 mm or 5 mm diameter.