Stetsonia Coryne is more commonly known as the Toothpick Cactus because of those fierce spines. In it's native habitat, the spines help to protect the plant from grazing animals.
In the wild these cacti grow quite tall, almost tree-like. In your home they should remain pretty compact but will make your plant collection look badass!
This cactus will enjoy a bright position and only water once the soil has completely dried.
The pot size is 15cm and the plant is approximately 15-20cm tall.