The Greek word for Pandora’s large storage jar is pithos, not a word meaning a small box.
Hesiod’s Greek text describes a pithos, a substantial earthenware storage vessel used in the ancient Mediterranean. Such jars could hold grain, wine, oil, or other materials. The vessel in the myth therefore belongs to the world of household and agricultural storage rather than to the modern image of a hinged box.
The “box” interpretation became influential through later translations and retellings. The Renaissance humanist Erasmus helped popularize the Latin phrase pyxis Pandorae, using a term associated with a box or container. That translation shaped the expression used in many modern languages.
The difference matters because the vessel’s size changes the visual meaning of the story. A sealed storage jar suggests a household object containing forces released into the human world. It also explains why paintings and classical references may depict a jar even when the title says Pandora’s Box.