I live in a city of just over 1 million people. Here is my opinions on options for selling bead jewellery:
Weekend markets No good, people looking for bargains, many stalls selling cheap imports
Monthly markets (run by Lions/Rotary Clubs or similar groups) Some good, some dud, you have to try it and see. If it's a good market, they will probably say: sorry, we have too many jewellery stalls at the moment!
School fetes Not good, unless it's a prestige private school, but most of those only accept vendors who are family of staff and students.
Agricultural shows (in semi-rural outer suburbs) No good, long hours, only sell cheaper items.
Annual festivals (put on by city councils mostly) Concentrated in October/November/April when weather is best, so you often have two or three same weekend. Try for those in upper-class areas, you do best.
Art and Craft Fairs (run by small art-craft clubs) Results variable - often badly organised, but again I say choose if in upper-class suburb, where you get rich customers.
Commercial Craft Fairs (in exposition halls or indoor stadia) Sometimes all that's available in winter, but entry fee costly. You do get promotion though, as it's run by professional events company.