Om/Ohm/Aum symbol it is one of the oldest and most sacred symbols. "Om is the one eternal syllable of which all that exists is but the development. The past, the present, and the future are all included in this one sound, and all that exists beyond the three forms of time is also implied in it". This is a beautifully crafted ring. The top portion with the symbol is about 10mm in diameter and it tapers down to the shank to a width of about 3MM. Available in whole sizes only in the sizes listed. Thank you for looking.