Beautiful
, Might want to separate them right about now.
You can keep them on the small side if you divide them often, but Aureomarginata gets about 68 inches wide. Do you know which Aureomarginata do you have? I am assuming 'Montana'.
If you want something for a pot, focus on the mini hostas, the mice, etc. Mine are about four-five inches wide, I ordered a couple more and two have not come up yet, cameo and I also have blue mouse ears, frosted mouse ears, snow mouse and I ordered pandoras box and a couple others, I will be putting them into a styro pot that looks like a wiskey barrel. Here is what they look like now.