How old is Herbert in the story the monkeys paw?

In the story "The Monkey's Paw" by W.W. Jacobs, Herbert White is portrayed as a young man in his early twenties. His age is not explicitly stated in the text, but based on his role as the son of Mr. and Mrs. White and his interactions with them, it can be inferred that he is in his early adulthood. Herbert's age is significant in the story as it adds to the tragedy of his untimely demise.