Eren is a young man of average height and build. He has a fairly long, yet rounded face, and sizable, expressive grey eyes (teal-green in the anime). His eyebrows are sparse and often furrowed, making him seem troubled or annoyed. His hair is short and black (dark brown in the anime), with his bangs falling naturally into a middle-parted curtain-type style. His complexion also seems somewhat tan. After his training and during his time as a soldier, he becomes very physically fit and muscular, often unseen through his baggy clothing.