Melkor var grandiose. Hans hjälm, som Morgoth, var så tung Beren kunde inte lyfta den [Lays of Belereiand, 8.4136-4137], och han hade en ärr och limp [12.3604-09, 3615-3617, 3632-3634]. Melkors fysiska form i början beskrivs som:
because of his mood and the malice that burned in him that form was dark and terrible. And he descended upon Arda in power and majesty greater than any other of the Valar, as a mountain that wades in the sea and has it head above the clouds and is clad in ice and crowned with smoke and fire; and the light of the eyes of Melkor was like a flame that withers with heat and pierces with deadly cold. [Silmarillion; Ainulindalë]
Han har också sagt att han har gått runt i olika "former av makt och rädsla" [från början av dagar]
he put on again the form that he had worn as the tyrant of Utumno: a dark Lord, tall and terrible. In that form he remained ever after. [Of the Darkening of Valinor]
Överskatt inte hur stor Melkor, eller någon av Ainuen var. Det finns också en annan beskrivning av honom när han slår Fingolfin:
Morgoth came, climbing slowly from his subterranean throne, and the rumour of his feet was like thunder underground. And he issued forth clad in black armour; and he stood before the King like a tower, iron-crowned, and his vast shield, sable unblazoned, cast a shadow over him like a stormcloud...
Melkor held aloft Grond, the Hammer of the Underworld, and swung it down like a bolt of thunder... Grond rent a mighty pit in the earth, whence smoke and fire darted...
Morgoth bore his shield upon him. Thrice he was crushed to his knees... Morgoth set his left foot upon his neck, and the weight of it was like a fallen hill. Yet with his last and desperate stroke Fingolfin hewed the foot with Ringil [The Ruin of Beleriand]
Morgoth är stor men inte som en jätte. När han satte sin fot på Fingolfin halsen kunde han fortfarande använda sin arm att svänga sitt svärd.