Rashi citing Targum Yonasan: Machzeyasa (mirrors). They are called Gilyonim because they are Megaleh (reveal) forms of the face. Or, perhaps their mirrors were Niglalos (rolled). Radak - Targum Onkelos of "b'Mar'os ha'Tzov'os" (Shemos 38:8) is bi'Machazayis Neshaya.

Rashi: They are linen sheets. People cover themselves in them.

Rashi: They are head veils. Radak - this is like "uv'Mitznefes Bad Yitznof" (Vayikra 16:4).

Rashi citing Targum Yonasan: Cheveinasa (ornamental clasps). They are of gold; they close the coat in which she covers herself.

Radak: It is a thin garment called Arid in Arabic. It is like "Nas'u Es Redidi me'Alai" (Shir ha'Shirim 5:7).