4 Large Black/Purple Mystery Snails (1/2"-2"+) Algae Eaters, Cleaning Crew Safe for Fish, Plants, and Shrimp

They generously added 5 snails (and they were all alive), but I was hoping they'd be a bit bigger (from 1/4" to just over 1/2"). They were advertised as 1/2" to 2" in size.