Petra' is a so-called shift dress, in which the cloth falls straight from the shoulders, with no cut at the waist. An even more precise definition would be a long-sleeved mini dress with fringe and sequin appliqué.
We found it in a Facebook group where second-hand clothes from international fashion brands can be bought in good quality. When we interviewed the designers, we realised that we had come across a sample: it has the original USE unused label, with the wholesale price on it. Only samples, which were sent to wholesalers, had that price on the pricetag. The brand always had the samples manufactured in Hungary, and that was the case with the Petra dress, too.