'Standard' in the Bible

The ephah and the bath are to be of equal volume; that is, the bath is to contain one tenth of an omer and the ephah one tenth of an omer. The omer is to be the standard on which their volume measurement is to be based.

"Here are the standards for presenting offerings: a sixth of an ephah that is based on the standard omer of wheat, and a sixth of an ephah based on the standard omer of barley.