Albert Barnes Commentary Ezekiel 45:11

"The ephah and the bath shall be of one measure, that the bath may contain the tenth part of a homer, and the ephah the tenth part of a homer: the measure thereof shall be after the homer." — Ezekiel 45:11 (ASV)

The ephah was in use for dry measure, the bath for liquid. The homer seems to have contained about 75 gallons (see Exodus 29:40, note; Leviticus 19:36, note).

After the homer - that is, according to the standard of the homer.