To serve as an Enlisted Sailor, you must be no older than 34 but at least 17 years old. If you are not yet 18, you must have parental consent. To serve as an Officer, you must be no older than 35 but at least 19 years old depending on the program desired. (Waivers may be granted for positions in high demand.)
Timothy Dalton's height is 6ft 1in (185 cm). Peak height was 6ft 1.75in (187 cm). British actor best known for playing James Bond in License to Kill and The Living Daylights. He also appeared in Flash Gordon, Hot Fuzz, The Lion in Winter, Hawks and Jane Eyre.
Assuming that in your question, the term big refers to height and weight, I can answer you. The average fully grown man is about 5' 6 (1.70m) tall, so Hagrid must be approximately 11' (3.40m) tall. Despite this calculation, according to filmmakers, Hagrid is 8' 6 (2.59m) tall. Also, Robbie Coltrane himself is 6' 1 (1.85m) tall. The second part of the narrator's description of Hagrid says that he is five times as broad as an adult man. The average length of an adult's waistline is 2' 9 (approx. 85 cm), at least according to my mother, so 85 times 5 equals 425 cm (13' 11).