Roman Numerals Rings

There is apparently quite a large selection of rings that have Roman numerals engraved on them. I am presently at a loss regarding the meaning and significance of this engraved message. As one seller of Roman numeral rings quite simple-mindedly acknowledged: "Don't worry about trying to figure out what roman numerals are on this ring, just trust us when we tell you they look cool."
Still, what does this mean? This can represent the idea of time (the numerals are I-XII), combined with the idea of eternity (a very persistant symbolic interpretation of a ring). 12, of course, is also the number of apostles, but I do not see much religious significance in this design. There may be other forms of numerology in place here. Some of the less insane sounding interpretations are:
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Twelve is the number of something that is complete and forms a whole, a perfect and harmonious unit. In ancient civilizations, this number corresponds to the idea of plenitude, completion and integrity of a thing.
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Number 12 is a symbol of material and spiritual food, because of the 12 breads which Jesus Christ broke at the Last Supper, Himself being the Bread of Life.
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12 symbolizes power and the Good, and governs both space and time, that is to say the operation of the Cosmos, hence its designation as a "cosmic number".
See also: Roman Numerals: Charts, Tips, History