I made my own drone ribbons from a pattern I downloaded from www.bagpipejourney.com. They're about 2 1/2 inches wide, by I forget how long...maybe 2 meters or so. I chose velcro for the fastening for ease of operation, but I guess you could use snaps or safety pins... Honestly, no one will really care how you fasten them as long as they look good going by.

Cheers!!