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 original coin, which was much the same except that the design was only of the then 15 members in their entirety and showing borders and no geographic features. The map was less detailed and the lines the stars were upon cut through where there would be landmass in eastern Europe if it were shown. The obverse side of the coin depends on the issuing country. All have to include twelve stars (in most cases a circle around the edge), the engraver's initials and the year of issue. New designs also have to include the name or initials of the issuing