
I have a small male (4cm) that also has a very odd dotted pattern especially on and around his head (will post some pics when i have a connection at home again)
About the size, i have seen some very big S. lineolata at "de Rifwachter" (a dutch fish/aquarium store in Hilversum NL)
males measuring around 7-8 cm and females just a bit smaller.
Myself i own a 6.3 cm female and Francois (another member here) owns a male and female of about the same size