Euro coins edge of the €2 coin also protects it from counterfeiting. Euro coins were designed in cooperation with organisations representing blind persons, and as a result they incorporate many features allowing them to be distinguished by touch alone. In addition, their visual appearance is designed to make them easy to tell apart for persons who cannot read the inscriptions on the coins. The coins increase in size and weight with value. Of the eight denominations of euro coins, the three lowest denominations are small, resemble copper in colour and are quite thin and light. The next three denominations resemble gold in
2 euro coin maximum volumes of coins that the individual countries may issue. "Unlike banknotes, euro coins are still a national competence and not the ECB's. If a euro area country intends to issue a €2 commemorative coin it has to inform the European Commission. There is no reporting by euro area countries to the ECB. The Commission publishes the information in the multilingual Official Journal of the EU (C series). The Official Journal is the authoritative source upon which the ECB bases its website updates on euro coins. The reporting process, the translation into 22 languages and publishing lead to unavoidable delays.