Wis. Stat. § 939.51: Classification of misdemeanors.

(1) Misdemeanors in chs. 939 to 951 are classified as follows:

(a) Class A misdemeanor.

(b) Class B misdemeanor.

(c) Class C misdemeanor.

(2) A misdemeanor is a Class A, B or C misdemeanor when it is so specified in chs. 939 to 951.

(3) Penalties for misdemeanors are as follows:

(a) For a Class A misdemeanor, a fine not to exceed $10,000 or imprisonment not to exceed 9 months, or both.

(b) For a Class B misdemeanor, a fine not to exceed $1,000 or imprisonment not to exceed 90 days, or both.

(c) For a Class C misdemeanor, a fine not to exceed $500 or imprisonment not to exceed 30 days, or both.