standard

Serving as or conforming to an established or accepted measurement or value.

Widely recognized or employed as a model of authority or excellence.

Acceptable but of less than top quality.

Normal, familiar, or usual.

Commonly used or supplied.

Conforming to models or norms of usage admired by educated speakers and writers.

An acknowledged measure of comparison for quantitative or qualitative value; a criterion. synonym: ideal.

An object that under specified conditions defines, represents, or records the magnitude of a unit.