Potted 4" The trickto keeping them alive is if it looks like it needs water, don't water it. SoP have small thin roots that succumb to rot very easily. When top watering you'll want to have it positioned where the top 1/4" dries out relatively quickly.This can be achieved by good airflow. Even though SoP is a succulent they do not like direct sunlight. They'll grow well in a east or west facing window with bright indirect sun.
String of Pearls