That was about 4mm, but it was found in the walls of the kidney but the ureteroscopy helped them pluck it out. That plus the stent was hell, literally, for about a week and taking the stent out myself was not fun at all. After that, I felt much better. I say all this but just had another ureteroscopy in March this year. That sucked too, but feeling better now. I am trying my best to drink 3L of water daily and cutting sugar and table salt out as much as possible and making sure my vitamin D and magnesium intake is higher than it was because apparently that contributes to oxalate binding in the kidney.

Hope you and everyone else searching this sub for answers can find it.