Each ring represents one of 108 earthly temptations a person must overcome to achieve nirvana.

The ring represents a promise to Usagi that they will eventually get married.

Twenty-seven stones complete the ring, representing the 27 students injured in the collapse.

Each ring represents a percent of the direct solar beam incident on the surface.

The ring of 27 stars around it represents Brazil's 26 states and the Federal District.

The gray ring represents the intellectually stimulating and changing nature of intelligence operations.

The ring holding the petals together represents the bond of brotherhood.

The ring actually represents a section of a pipe.

The innermost ring represents the central business district.

Each symbol, or each ring of a symbol, represents a single day.