>Her version turned out controversial because Gollum is a giant compared to Bilbo. Turns out Tolkien hadn't described Gollum's size anywhere
Cain and Abel, whom Deagol and Smeagol (Gollum) parallel, may have been giant themselves, given that Adam (their father) is specified in certain religious /apocryphal texts as being 60-100 cubits tall, or 90-150 feet.