Shroud replacement

We have a number of old wooden Mirrors in Sydney that we are renovating and several need new shrouds. Does anyone know what the standard size is for this stainless steel rope as we have different sizes.We are leaning towards 2mm 19 core at present which has a breaking strain of 323KG but are also looking at 1.6mm with a breaking strain of 182KG.
Does anyone have any experience of using the 1.6mm 19 core?
The 7*7 core has been mentioned as more flexible but it loses out on breaking strain.
Thanks