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
1 euro coin that have not yet adopted the euro, some of them have already agreed upon their coin designs; however, it is not know exactly when they will adopt the currency, and hence these are not yet minted. See enlargement of the Eurozone for expected entry dates of these countries. One-euro coins have been produced every year in Belgium, Finland, France, the Netherlands and Spain. In Austria, Germany, Greece, Ireland, Luxemburg, Portugal, San Marino and the Vatican City no €1 coins were minted dated 1999, 2000 and 2001. In Monaco, no €1 coins were minted in 1999, 2000, 2005, 2008 and 2010.