7/8 is my most popular, then 1.5, followed by 5/8 and finally 3/8. I don't make ribbon sculptures though. I also live in the South where big bows are king.
In fact, this always makes me laugh. One of my store owners called me with a bow order once and she said, "She needs the bow in a small size for her 1 year old. You know...because she's not from around here."