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 The edges of the 2 euro coin vary according to the issuing state; Austria, Germany and Greece will also at some point need to update their designs to comply with guidelines stating they must include the issuing state's name or initial, and not repeat the denomination of the coin. In addition, there are several EU states that have not yet adopted the euro, some of them have already agreed upon their coin designs however it is not known exactly when they will adopt the currency, and therefore these are not yet minted. See enlargement of the Eurozone for expected entry