Rapunzel Hair

Western Animation

 * Princess Bubblegum and Marceline of Adventure Time fame have this, with PB's reaching roughly to her knees while Marceline's goes even farther than that. Finn as well in an early episode, although it was cut seconds later. While not at its original length, his hair once again qualifies for this trope as of "Flute Spell".
 * In the episode "Bad Little Boy", Finn's Gender Flip counterpart Fionna is revealed to have this sort of hair.
 * Ice King and his Gender Flip counterpart Ice Queen have this hair too.
 * On Gravity Falls, Mabel, Wendy and Pacifica all have hair that goes down their waists.
 * The Powerpuff Girls: Forget wearing capes, Blossom's orange locks are long enough to be a cape! It's also long enough to support a highway for toy cars and be styled to look like a rabbit, both at the same time.
 * Several characters from Steven Universe have incredibly long hair: Opal by extension, young Greg, Stevonnie, Sapphire, Rose... Opal's hair goes down to her knees, and Stevonnie's hair just reaches the back of their thighs (at least before Connie cut her hair short). Every known fusion involving a Quartz has long hair as well, since it seems to be a common trait among Quartz Gems.
 * Sierra from Total Drama has hair reaching her butt (and she's the tallest girl), and given how it's braided it should be even longer. Unfortunately, after her injury near the end of the season, she became bald. It grew back in All-Stars, but it' s a lot shorter.