The Backyardigans

 is a Canadian/American CGI animated series created by Janice Burgess.

Synopsis
Each episode follows a similar pattern and centers around a group of five animal friends: Uniqua, Pablo, Tyrone, Tasha, and Austin. The characters introduce themselves in their backyard before imagining a new location to enter. The group is often presented with multiple dilemmas along the way to accomplishing a specific goal or priority or may be challenged with a significant single obstacle to defeat or problem to solve. After season one, there is usually a villain in the episode, mainly played by one of the Backyardigans (thus another Backyardigan plays the role of the hero), but the villain of the episode always reforms in the end. The program also follows a musical format. It features multiple musical numbers performed in the style of a different genre and sung throughout an episode regarding whatever imaginary predicament in which the characters have situated themselves or perhaps a challenge they have met, every episode opening and concluding with a particular song. The adventures get more advanced after the first season. When the Backyardigans have achieved their mission or defeated any disadvantages, the fantasy sequence fades, restoring actuality to the setting of the episodes as the closing song is sung, the characters scurrying to their houses for a snack after one or two’s stomach(s) growl. The main character or characters then opens the snack host's house door, fence, or around the corner, and shouts the main catchphrase for the last time and then closes the door. The picture then is lifeless, with some background bird noises often heard as iris closes, ending the episode before the credits roll.


 * Source: https://en.wikipedia.org/wiki/The_Backyardigans

Featured perfect giantesses: Tasha and Uniqua

 * Both are protagonists.
 * Both were giantesses in two episodes.
 * However, Tasha got more time as giantess, also she were the bigger giantess in both cases.