Certified GKH Gardening Expert
Each time you pot it up, it will need a container about an inch larger on all sides. The size will differ each time that you pot it up until it stops filling out the container with roots.
Potting up any larger than an inch on all sides will lead to extra soil moisture, which will lead to root rot.
If you want a certain size container, then make sure that when you divide, you fill the container enough with divisions that there isn't too much extra soil.
Here is an article that will help you to care for the plant: