One of the classic measurements of symmetry is for the neck, arm and calf to all have the same measurement. Ancient greek sculpters used this standard of symmetry in their work.
Old time bodybuilders also went by this. It was a common goal among bodybuilders to develop all 3 to equal size. Old time BB magazines used to include neck exercises along with all the other exercises.
It wasn't until the late 60's, early '70's that the trend started toward mass with less regard for classical symmetry. What a coincidence, that's also when steroids became wide spread.
Frank Zane, 3 time Mr. Olympia, is one of the last great bodybuilders who aspired to this classical symmetry. He won Mr. Olypia at 5'9", 185 pounds with 18" arms, 18" neck and 18" calves, and a 30 inch waist. He had an ab vacuum shot that no one today could match. Nowadays he wouldn't even get a call out, which is a commentary on the sad state of affairs in pro bodybuilding.
MaxRep