Shiro plums are oval-shaped stonefruit that are a golden-yellow in color when ripe. They grow to around 2.5 centimeters in diameter. Shiro plums ripen from green to yellow, sometimes with a faint pink blush. The outer skin is thin and tart in taste. The inner skin is golden-yellow and semi-transparent. It is soft, juicy and moderately sweet with very little acidity. Shiro plums have a single inner seed or pit.