Eudyptes sclateri are approximately 65 cm tall and at the maximum weight, which occurs before molting, weigh about 6.5 kg. The males are generally larger. In the adult, the coloration of the head, upper throat, and cheeks are a very dark black. There is a broad yellow stripe that starts near the face, which rises over the eye to form the erect crest. The body and upper parts, along with the tail, are blue-black while the under parts are white. The dorsal side of the flipper is blue-black with a white edge, while the ventral side is white with a black patch at the tip of the flipper. The beak is long and slim with brown-orange coloring. The chicks have gray-brown upper parts and white under parts. Juveniles have a slight coloration difference from the adults but the main defining feature is the shorter crest (Williams 1995; Barham and Barham 1996).
Average mass: 6000 g.