Coinage of the Ptolemaic kingdom was struck in Phoenician weight, also known as Ptolemaic weight which was the weight of a Ptolemaic tetradrachm. This standard, which was not used elsewhere in the Hellenistic world, was smaller than the dominant Attic weight which was the weight of standard Hellenistic tetradrachm. Consequentially, Ptolemaic coins are smaller than other Hellenistic coinage. In terms of art, the coins, which were made of silver, followed the example set by contemporary Greek currencies, with dynastic figures being typically portrayed. The Ptolemaic coin making process often resulted in a central depression, similar to what can be found on Seleucid coinage.