Boyblue’s DC Universe: The history of Supergirl

The evolution of the Supergirls of DC’s main continuity.
(Right-clicking this image and opening it in a new tab will show a a bigger version than only left-clicking. I have no clue how to fix this.)

* In a few issues of Action Comics in 1960 Supergirl’s skirt was colored red. (#261, #262 cover only, #263) I assume that this was a coloring mistake.