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
10 euro cent coin that have not yet adopted the euro. Some of them have already agreed upon their coin designs, but it is not known 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. The coin has the nickname "dubbeltje" in the Netherlands, a term carried over from the previous currency. 10 euro cent coin The 10 euro cent coin (€0.10) has a value of one tenth of a euro and is composed of an alloy called Nordic gold. All coins have a common reverse side