19 3/8" is the length from post to post on a coupe (1968). I just measured the ones that came with our car in our garbage can of parts. Unfortunately for us, we need convertible visors which are differnt. The coupes came with a bedford grain in the fabric, convertibles had the vinyl madrid grain. If you need coupe visors, I can send you pictures of what we have. I wonder if you have convertible visors (not sure the length on those)?
