As Kurt wrote, there are photos and articles that mention the smaller wheels and longer cranks favored by Cinelli. Here is one that also mentions the dusty rose or rust-colored bike that Cinelli (and his wife) rode:
http://bikeraceinfo.com/
The bike that Cino is holding in the photo 1/4 of the way down this page,
titled "Undated photo of Cino Cinelli with a classic silver Super Corsa" is
also what I take to be a "small-sized" Cinelli:
http://italiancyclingjournal.blogspot.com/
Steven Maasland
Moorestown, NJ
USA