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 cent coin further expansions envisaged, the common face of all euro coins from the value of 10 cents and above were redesigned in 2007 to show a new map. The 1- to 5-cent coins, however, did not change, as the highlighting of the old members over the globe was so faint it was not considered worth the cost. However, new national coin designs were added: in 2007 for Slovenia; in 2008 for Cyprus and Malta; in 2009 for Slovakia; in 2011 for Estonia; in 2014 for Latvia; and in 2015 for Lithuania. The coins are composed of copper-covered steel, with a diameter