So I'm not sure if these really qualify as klonks, but they measure from 10-13mm so they are on the larger side. This is my second strand of freshwaters (my first was 9,5mm so it seems like I am indeed struck by PSS). I bought these second hand (from a pawn shop) and I think they were reasonably priced. However, being the newbie that I am, I would very much like to hear your opinions. These pearls are somewhat off round and have some surface imperfections, and they need restringing because whoever strung these last made the graduation look very off center and wonky. But I think these pearls are beautiful and as far as I can tell they have a nice luster (clearly I'm no expert at this though! ). I'm hoping my pictures are good enough for you to tell!