Scale of upholstery button Sizes Upholstery buttons are measured by the English standard of 40 lignes per inch. Therefore, a 30 ligne button is 3/4" diameter, a 45 ligne button is 1-1/8" diameter, and so on. The diagram shows the size of a button shell before covering.
We stock the most common upholstery buttons, button molds and dies. We welcome requests to special order any item in either the Handy Button or CS Osborne catalog.