Large size dating
Whale Shark: A megalodon was probably slightly larger than a Whale Shark, which can reach lengths around 41 ft.Blue Whale: A megalodon was probably about half the size of a Blue Whale, which can reach lengths of around 94 ft.
So don't worry if you find a tooth with very small cusps, and can't tell if it's a juvenile megalodon or a subauriculatus; it's a Megatooth shark, leave it at that!
It is not alive today, and has been dead for millions of years. Although the largest teeth from megalodon are a little over 7 inches, A more common size for megalodon teeth is between 3 and 5 inches.
The image shows one of the worlds largest megalodon teeth.
Therefore it is difficult to say how big the megalodon shark could actualy grow. Some estimates (Pimiento & Balk 2015) give a megalodon a maximum average length of around 59 feet (18 m), while other estimates are a little higher, such as 66 feet (20.2 m) (Gottfried et al. The average size of a megalodon was around 33 feet (10 m).
Regardless of the exact size, it was an impressive animal!