Released into circulation: 4 August 2005
Metal composition: the core of the coin is made of an alloy consisting of 92% copper, 6% aluminium and 2% nickel, while the ring is made of an alloy exhibiting a silver lustre, which consists of 75% copper and 25% nickel.
Diameter and weight: the coin is shaped as a regular dodecagon, with the circumscribed circle diameter of 32 mm, and weighs 12.75g. The core of the coin is 18mm in diameter and weighs 4.05g. The ring is 18mm in inner diameter and weighs 8.70 g.
Motif on the obverse: the central part of the coin core features two squares symbolising the Republic of Croatia, placed one above the other with touching corners. The squares' edges, shown as if in motion, are formed by three lines, modelled after the Croatian wattle. The loose lines in the right upper corner of the lower bigger square are a symbol Croatia's openness towards the European Union. These lines stretch over to the coin ring embossed with twelve EU stars, which are interlaced by the Croatian wattle, as a symbol of Croatia's determination to become an integral part of the EU. Positioned centrally along the lower edge and bordered by a small square on the left and a small star on the right is the date "18 June 2004". The inscription "REPUBLIKA HRVATSKA KANDIDAT ZA ČLANSTVO U EUROPSKOJ UNIJI" continues from the date to the right, closing the circle on the coin.
Motif on the reverse: the central part of the coin core features the denomination numeral "25". The outlines of the number "25" reveal an image of a marten turned to the right, with the marten's body integrated with the denomination numeral. Positioned centrally at the lower part of the coin ring is the coat of arms of the Republic of Croatia, bordered at the left by a blooming laurel branch and at the right by a common oak branch with acorns. The upper part of the ring bears the inscription "REPUBLIKA HRVATSKA".
Occasion commemorated: the Republic of Croatia becoming an EU membership candidate, 18 June 2004
Items issued: 30,000