Chasuble development examples in the V&A
The other day, I spent a while in the Victoria and Albert Museum, a wonderful collection that never fails to fascinate. I noticed that there are several examples of chasubles made in the 15th century that were later altered in the 17th century. The notes on the chasuble in the above photo tell us that it was dates from 1425-1450, and was remodelled after 1600. (We are also told that it is of silk damask with metal thread, from Italy or Spain, with embroidery from Southern France in linen and silk with metal thread.)
If I have correctly applied what I have learned about these things (I am by no means an expert) then presumably the chasubles were originally of a much fuller shape (perhaps even conical) and were cut down to a more-or-less Roman style, a little like the "Borromean" style which has become more popular recently.
I am reminded of the stories of Cardinal Hinsley who was wont to take scissors to gothic styled vestments to make them Roman in shape.