The Oxford Palmette Class was the last group of artists, or of vases, to precede the Komast cups and Siana cups. They probably developed under East Greek influence out of skyphoi. These pre-Komast cups are larger than earlier cups, and reach about the same size as Komast cups and Siana cups. They feature the first conical cup bases in Attic pottery. The works of the Oxford Palmette Class are dated shortly after 580 BC.