If someone is caught with less than 2 ounces of marijuana, then it is typically filed as a Class B misdemeanor. Class B misdemeanors have a range of punishment up to 180 days in county jail, and up to a $2,000 fine.
If someone is in possession of more than 2 but less than 4 ounces, or if they are caught with less than 2 ounces in a drug free school zone then it will be filed as a Class A misdemeanor. That carries a range of punishment of up to a year in county jail, and the fine doubles.
If it is alleged that someone is in possession of marijuana greater than 4 ounces, or if it is alleged that someone was committing the offense of Delivery of Marijuana of any size, then it likely will go to the Grand Jury for indictment as a felony offense.