There are other types of dahlia which have no officially recognized standards for judging. Some show schedules have items for these types of dahlia, and it is up to the judges to use their knowledge and experience in judging these types.
The general Judging Guidelines apply to these as they do to all types. Bloom size classes may be under or over 160mm.
Miscellaneous types you may see include Orchettes and Double Orchids.
Some popular varieties, such as the Delbard range do not fit into the standard show types. They are used with success in floral art including Display and Container sections in shows. They have been used successfully in Novice Championship entries but show types are preferred.