Coinage of the Ptolemaic kingdom was struck in Phoenician weight, also known as Ptolemaic weight. This standard, which was not used elsewhere in the Hellenistic world, was smaller than the dominant Attic weight. 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.
A silver tetradrachm of Ptolemy IV Philopator, who reigned from 221-205 BC; an undated issue from the Arados royal mint, struck circa 214-212 BC, 26mm in width, 14.10 gm in weight; the obverse shows a diademed head of Ptolemy I Soter wearing the aegis, while the reverse shows an eagle standing on a thunderbolt.