Frankenstein’s monster is described as about 8 feet tall. Victor chooses this gigantic stature because constructing a human body from many small, intricate parts would otherwise take too long.
In the creation narrative, Victor first considers making a being similar in size to an ordinary human. He changes his plan after recognizing the practical difficulty of assembling muscles, veins, fibres, and other anatomical details. He therefore makes the Creature “of a gigantic stature,” about eight feet in height and proportionately large.
The height is part of the novel’s contrast between human ambition and natural scale. Victor wants to create a new species and imagines that future beings might bless him as their creator. Once the Creature awakens, however, its extraordinary size contributes to the shock of its appearance and makes ordinary human acceptance even less likely.
The Creature is often called “Frankenstein,” but Frankenstein is Victor’s surname; the being itself is never given a personal name. Film and stage adaptations have also changed details of its appearance, so illustrations may show different proportions. The original text’s measurement is approximate, not a precise modern medical specification.