One of the things that has weirdly defined my life is that pretty much since I went to college and first got serious about costuming I have been working on writing a costume book. It never gets finished, but I make lots of components for it. In the 1990s this morphed into The Costumers Manifesto web site, but back around the late 1970s and early 1980s it was just a few random things that interested me. Detachable hard collars have always had a fascination for me and so in those pre-Internet and pre-home printer/scanner/copier days I set out to make life size drawings to be used as patterns of my then small collar collection (back when it still fit in a single large cookie tin) in imitation of my hero Janet Arnold. These were laboriously hand drawn with a Rapidograph, a high maintenance technical pen that is the ancestor of my now favorite Signo Uniball pens.

The idea with all these is that since both sides of the collar are identical, you can use them to form a pattern that you can lengthen to the needed size so long as you have the basic shape. In all cases seam allowance must be added!