Lithops localis Mesemb Mature plants are roughly 1'

Mature plants are roughly 1' diameter

Huernia x 'Spiny Norman'  Family: Apocynaceae (Asclepidaceae)

with white to pinkish radial spines and reddish brown hooked spines

It stays small and is a heavy clumper

which is what you should assume your plant will have

Lithops localis Mesemb Mature plants are roughly 1'Lithops localis Family: Aizoaceae. A nice gray to pink Living Stones with polka dots. Produces yellow flowers in the fall. Lithops have an undeserved reputation for being difficult. The really aren't as long as you pay attention to its particular needs. Unlike most plants Lithops have two growing seasons and two dormant seasons per year. Overwatering is the biggest risk in growing these plants. Give water as the soil is about to dry out in the spring