Probably 1/2 - 3/4 inches long

Probably 1 inch to 1 1/4 inches long.  Primarily yellow body with black on the upper fin and a single, broken/dotted black line horizontally on the body.

Best I could get of the yellow adult.  There are 2 adults, one that is just yellow with a black mark on the upper fin, and one with the black/dotted line on the body.  The plain yellow one is the female (mother to the little ones) is a mouth breeder, and may be getting ready to have more little ones.  She gets a silver look, like the mouth is lined with foil and the mouth area expands a little (more as the fish get larger).  The Adult yellow ones may be between 2 inches and 2 1/2 inches or so (best guess).

This is the "Electric Blue" one.  Very bright, almost neon.  Glows more under flourescent than under natural sunlight.  Approximately 2-3 inches in length.

The camoflague fish.  Mottled and when stationary blends in well with the surroundings.  (Pleco in the background). 
The Camo fish has since passed away.

Lots of rocks, plants and bubbles.  We have changed it around to provide more caves to hide in.