Jacob is 6'7" tall, with a toned and muscular build. Bella describes him as having dark russet skin. In New Moon, upon discovering his werewolf powers and joining the Quileute pack, he crops his black hair hair (which used to be kept in a pony tail) short. Later he grows it out to chin length in Eclipse because he thinks Bella likes it better that way. He tends to wear only cut-off style jeans, saying that when turning from human to a werewolf and back he doesn't like to have to carry a lot of clothes since they are ruined during transformation. In Breaking Dawn he cuts his hair short again and it seems that he has grown even taller. It is noted by Bella that he would surely hit his head upon the beams of her new cottage. As a wolf, Jake has russet brown fur, dark eyes that show intelligence, and is very swift. He is also the second fastest and the second largest in the pack, but later grows to be the largest and also the fastest.