I have always disliked the idea of size limit on baits for a swimbait omly tournament. Obviously my baits would not qualify if you put a size limit. My baits are proven big fish catchers. Even my baby bass at 4.5inches mainly catches big bass. It may be small but its a big bass bait. My gills have probably caught more 10lb fish than 95% of the the "swimbaits" on the market. The task of a swimbait list will be dificult to say the least. I think you should make a list of aproved baits on a bait by bait basis. If its swimbaits only and not big baits only than you would have to determine what a swimbait is. I feel that a swimbait is a rubber fish. the Castaic hard head and BBZ typs are hybrids and all other hardbaits are big plugs. Of corse you would have to allow the hard baits to. You could also do a size limit with certain exceptions such as my baits, baitsmiths, the smaller Castaics ets.
Any way you do it sombody is going to argue for a soecific bait. It will be impossible to make everybody happy. I would just make a list of specific aproved baits and all custom baits would have to be pre aproved by the Tournament director well before the date of the tournament. After that date no non aproved baits should be allowed.