Center portion is a rubber patch. Medallion is 4" tall by 3.5" wide Beaded lanyards is 28total length and does not untie simply slips over your head. Your item comes with Certificate of Native American Made/Celtic Made Authenticity. Domestic Buffalo Bubalus bubalis horns are used to make this breastplate as they are a NON-endangered species of buffalo, Non endangered deer Odocoileus hemionus which is not endangered. Was used to make the leather for this piece.