I don't mean a button for fastening clothes, I mean a metallic decoration sewn on clothes but in the same manner as a button.
We know that both bronze age
, and later nomadic steppe peoples, often had
many metal ornaments
seen on their clothes. There are Scythian grave with hundreds of small metal bits that were sewn on clothing. The so-called scale
armor bits that are tear-drop shaped, convex and have a single hole in the middle were actually decorations sewn onto clothing.
Maybe something like that.