My mother in law, from Denmark, received an indoor Danish flag as a present and wanted me to make her an indoor flagpole. Trying to make it as authentic as possible I looked for the pole topper but couldn't find one for sale online except in Denmark and that site didn't ship overseas. So I attempted to design one based on photos. The mother in law was happy so it must be close to right. However, since it was designed based on photos, the proportions may be off but they are close. That being said the included scad file was created so the knob is proportional to the size of the pole and the relative proportions are customizable also. If anyone has the exact proportions, leave a comment.
Red (of course)
It probably can be printed without supports if you flip it over but I do not trust my printer to not bump it an have it release from the printer.