During lobster season, some state fish and game laws require that once lobsters are caught, they must reach the minimal legal size (3.25 inches carapace length) or  be returned to the water. With the Gear Keeper RT2 self-retracting tether from Hammerhead Industries Inc., you can give your catch a quick size check. The Gear Keeper attaches to your clothes, and the gauge extends up to  36 inches and retracts back when you're done measuring. The Gear Keeper retails for $19.99. (805) 658-9922.