Reverse The central part features a three-line inscription: 25 PENNIÄ 1899. Oak branch wreaths are placed along the left and right edges of the coin, not touching at the top. The branches are tied at the base with a ribbon forming a double bow. The rim is decorated with raised denticles.
Obverse The center of the obverse is occupied by the coat of arms of the Grand Duchy of Finland — a double-headed eagle bearing the princely arms of Finland on its chest. Both eagle heads bear crowns, with a larger third crown between them, all connected by a ribbon. The Finnish princely arms are a heraldic shield depicting a lion holding a sword in its right forepaw and a sabre in its left. A princely crown is above the shield, which is surrounded by the chain of the Order of St. Andrew the Apostle. In the eagle's left talon is an orb, in its right a sceptre. Below the right talon is the initial 'L', indicating Mintmaster Johan Konrad Liro (Helsinki Mint). The rim is decorated with denticles pointing inward.