Ice is a greatsword as wide across as a man's hand. The blade is taller than an adolescent Robb Stark and near as tall as Ser Ilyn Payne. Its Valyrian steel is dark and smoky with deep rippling.
but yeah in the books at least longclaw was also pretty big... and jon is short iirc?? i remember jeor telling him to wear longclaw over his shoulder because it was too long to wear at his hip when he gave him the sword (but also book jon was 15 so lmao)