no suggested needle and gauge given

From official page:

Added as a new type of yarn in the Miroir series. Using sparkly lame that reminds us of “Miroir”, meaning mirror, we created knotted threads that look like beads (known as “perles” in French). Because of its incredibly fine thread count, it won’t compromise the texture of the base yarn if mixed with another yarn, and finishes fabrics with a dainty and refined glimmer. The thickness is super ultra-fine.