FYI,
"Durable Dot" and "Baby Dot" are trademarked names for snaps, originally made by Dot, and now owned by Scovill. They are functionally the same; the difference between them is the size of the snaps. The sizes are commonly referred to as ligne 24 and ligne 20. Ligne was originally a French term for the measurement of a unit of length. In the 9th century, German button makers used the term to measure the diameter of their buttons, and that is how it is commonly used today for snaps. There are 40 lignes per inch, so a ligne 24 snap has a button that is 24/40" in diameter and a ligne 20 snap has a button that is 1/2" in diameter (20/40).
