This Tanganyikan variety ("sumbu shell") is considered a "dwarf" compressiceps variant that exhibits shell-dwelling tendencies. The males grow to about 3 inches and the females stay closer to 1.5." They eat pellets currently, but also like white worms and they especially love cherry shrimp.

You are bidding on a proven pair of adults. These took about 3 years to spawn. They currently spawn about once monthly in a 0.5" PVC elbow. I recommend keeping these alone in a tank and removing the parents as soon as eggs hatch.