Lobster Measuring Gauge
Lobster measure, for measuring the carapace, or body shell, of the lobster. The shorter measure is 3 1/4", and that is the minimum allowable size of the carapace; the maximum is 5". If the lobster carapace is between these two lengths, and the lobster is not an egg-bearing female, it may be kept. Otherwise, the lobster must be thrown back. This measure has a float attached to it, so that it won't sink if dropped overboard.