It is edged with a water caltrop motif and the mirror surface is slightly convex. On the reverse side is a tortoise shaped button surrounded on four sides by lunar themes: "Chang O flies to the moon", a cassia tree, a jade hare, and a toad.
菱花邊、橫切面略成弧形，背面正中以龜為鈕，紋飾以嫦娥奔月為主題，桂樹、玉兔、蟾蜍分列四方。