These locks can grow up to three feet indoors, and more than ten feet outdoors. Don't let her common name fool you—she's not a palm at all. She's actually a succulent within the agave and thrives in similar high light, infrequent watering conditions.
Bright indirect to direct light.
SM: ~12" tall and a 4" pot.
MD: ~18" tall and a 6" pot.
LG: ~2' tall and a 10" pot.
Pro-tip: They are susceptible to root rot, so don't overwater them. 12 oz of water every two weeks is good.