The State of Maine has special laws to protect the lobster fishery. There are both minimum and maximum size measurements for harvesting lobsters. The minimum size is designed to make sure that all lobsters are mature enough to breed at least once before they are harvested. The maximum size limit is set to protect the breeding stock. A minimum size lobster will weigh around 1 pound, while a maximum size lobster will weigh between 3 and 4 pounds.