how big is robbie coltrane
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).