According to his autobiography, ARNOLD: THE EDUCATION OF A BODYBUILDER, Arnold is 6'2', or 1.88 metres tall.
His measurements at the peak of his career were:
Arms: 22 inches
Chest: 57 inches
Waist: 34 inches
Thighs: 28.5 inches
Calves: 20 inches
Weight: 235 pounds https://en.wikipedia.org/wiki/Arnold_Schwarzenegger