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 dates of these countries. Latvia officially introduced the euro on 1 January 2014, its design for the 2 euro coin is similar to the 5 lati coin's design from 1929 to 1932: Each state, allowed to issue coins, may also mint two commemorative coins each year (until 2012, it was one a year). Only €2 coins may be used in this way (for them to be legal tender) and there is a limit on the number that can be issued. The coin must show the normal design criteria, such as the twelve stars, the year and the issuing country. Not