Small: 3.5 - 4 inch standard nursery pot.
Keep her in bright light, with some direct sun (but not all day) for the best colour and plenty of leaves.
If you notice large spaces between leaves, the chances are the plant is not getting enough light.
She is a semi-succulent plant, which means it is more tolerant of dry soil than wet soil and is prone to root rot. You should water it sparingly, if in doubt. You can always add more water.
You can confidently allow the soil to dry out completely between waterings. This plant goes dormant in Autumn and Winter and therefore needs less watering. The soil should be lightly moist in spring and summer.
Specific Plant Care
This is a plant that enjoys 40-50% humidity and thrives between 18 and 24 Celcius, so is well-suited to most homes.