Description:

Obverse

In the Brass center it is shown stylized honeycomb that symbolizes European Union. The structure of a honeycomb make twenty-seven cells that are filled with a star, symbols of a countries that are members of a European Union. In the lower part of a honeycomb there is placed one little square, the symbol of the Republic of Croatia, which is on the way that existing structure of a honeycomb expands to a twenty-eighth cell in which it would become a star like a new country being a member of a European Union, the Republic of Croatia. Alond the edge of the coin is written "UGOVOR O PRISTUPANJU REPUBLIKE HRVATSKE EUROPSKOJ UNIJI" (Accession Treaty of the Republic of Croatia to the European Union). In the lower central part of a ring is written the date "9.XII.2011." (XII is number 12 in Roman).

Reverse

In the Brass center of the coin, it is written nominal value of the coin, number 25. In the contours of the number 25, there is shown a marten running to the right. Under the number it is written "KUNA". In the lower central part of a ring, it is placed a Coat of Arms of the Republic of Croatia. On the left side of a Coat of Arms of the Republic of Croatia it is placed laurel branch and on the right side, it is placed oak branch.On the upper part of the ring it is written "REPUBLIKA HRVATSKA" (The Republic of Croatia).