Callipogon barbatum reaches a length of about 50–60 millimetres (2.0–2.4 in) in females, about 100 millimetres (3.9 in) in males. Head and pronotum are black, covered with white-yellowish hairs. Elytra are reddish-brown or light brown with a reddish tinge. The males have well developed mandibles, with long light brown and red hairs. The mandibles of females are much shorter than the in males. Antennae are dark brown, up to 80 millimetres (3.1 in) long.