IT IS NEALLY THE SAME HEIGHT AT TOWNNN it is defo bigger then Robert dickemens peac I think 40ft of the ground
THIS IS SO ANNOYING, I HAVE TO KEEP CHANGING THIS ANSWER! THEY are named after and Old Pirate Named Harry...
Old Harry's Rocks are around 65 million years old!!
About 65million years old
The real reason on why OHR (Old Harry Rocks) are called so, is because they were named after a famous pirate, known as "Old Harry".