Mundella had a striking presence, being tall and thin and bent at the shoulders with a dark complexion, a prominent hooked nose and a flowing beard. He reminded some of an Old Testament prophet. Easily recognisable, he was reported to be a familiar figure in London, in the summer months "in his light suit of clothes and white hat", while in the House of Commons the gorgeous and multi-coloured hue of his socks "used to be the admiration of young members".