Charles Ellicott Commentary Leviticus 6:6

"And he shall bring his trespass-offering unto Jehovah, a ram without blemish out of the flock, according to thy estimation, for a trespass-offering, unto the priest:" — Leviticus 6:6 (ASV)

With your estimation. —That is, according to the official valuation; the ram is to be so grown up as to be worth two shekels. (See Leviticus 5:15.)