The largest Meg tooth ever found was almost twenty centimetres in length . The measurement is taken diagonally, from the tip of the sharp point to the back corner of the tooth. A tooth that huge weighs several kilos and will cover your hand if you hold it How is a Meg tooth measured? A all the way around by tracing the edges and then measuring them B diagonally, from the front point to the back corner C from side to side at the widest part D around the middle with a piece of string