Only minis made entirely of plastic material are to be used. For example, wood, metal, epoxy and minis made with other materials are not approved.
To be used in competition, all mini discs must be 4.5 inches (11.43 cm) or less in diameter.
Mini competition uses all WFDF approved rules except for these variations in the disc size.
Mini disc golf uses the approved disc golf rules except for a few necessary variations in play and targets, which are listed at the Mini Disc Golf Federation (MDGF) site: http://minidiscgolf.com.