How many copies did the very hungry caterpillar sell?

"The Very Hungry Caterpillar," written by Eric Carle, has sold over 50 million copies since its publication in 1969. This beloved children's book has been translated into numerous languages and remains a classic in children's literature, cherished for its engaging illustrations and simple, educational story. Its enduring popularity contributes to its status as one of the best-selling Children's Books of all time.