How accurately do egg producers sort their eggs by size? Egg cartons list a size category. But the actual mass and shape of each egg may vary. This project checks whether brown eggs or white eggs match their labeled size more closely. You weigh 12 brown eggs and 12 white eggs on a triple beam balance. You also wrap a tape measure around each egg at its widest point. Then you compare how consistent the measurements are within each color group. The brown eggs turned out to be more uniform. Their mass and circumference varied less than the white eggs.