So, the provenance corresponds with the two cosmic diagrams (BNF Fr. 565 and Harley 334), all produced 1400-1450 and from Paris.
The "hat" itself can be seen in various illustrations, but the "tail", when it can be seen, is often shoulder-length, or not much longer. By comparison with which, the tail on the hat of VMs Sagittarius seems a bit longer. The tail on the hat in the Cod. Bodmer image (Post #23) is the longest tail I've seen. It shows that the VMs illustration is not an exaggeration. And at the same time, it provides a fairly definitive perspective on historical fashion.
The "hat" itself can be seen in various illustrations, but the "tail", when it can be seen, is often shoulder-length, or not much longer. By comparison with which, the tail on the hat of VMs Sagittarius seems a bit longer. The tail on the hat in the Cod. Bodmer image (Post #23) is the longest tail I've seen. It shows that the VMs illustration is not an exaggeration. And at the same time, it provides a fairly definitive perspective on historical fashion.