"Attack of the 50 Foot Woman" was a B-movie that became a cult classic in the late 50's. Some 20 years later, Hanna-Barbera took that concept and put a new spin on it.
In this short from The All-New Super Friends Hour, we are introduced to Dr. Amy Zonn, who has developed a serum she thinks will make women equal to men in terms of strength & power. Typical of the period, in that she is a misguided scientist whose ideas are being cast in the wrong direction, as Wonder Woman, Batman, & Robin will discover.
Of course, the heroes would have to contend with another giantess a year later, with Giganta as a member of the Legion of Doom.......
Edit, 7/3/18: The entire episode is now available, as the video had to be replaced. You will also see:
Wonder Twins in "Cheating".
Aquaman & Samurai in "Attack of The Killer Bees".