The look: As all BSC fans know, Claudia is an artist and her wardrobe reflects her eclectic, pop-bright sensibility.

“The fun part of Claudia is she looks in her closet every day — whatever she is feeling that moment, she dresses to it,” Summers said.

The story: Tamada is “very petite,” Summers said — a good four inches shorter than her fellow club members.

Claudia’s room is BSC headquarters, so Summers made sure to have “pieces of fabric lying around her bedroom that were from outfits that she wore, so you could see that she made and created some of her pieces.” Subverting the (honestly overrated) counsel of Coco Chanel who supposedly advised would-be chic women to look in the mirror before leaving the house and take one thing off, Claudia piles on the accessories.

The vision board for Claudia’s aesthetic was “kind of amazing,” Summers said.

A ’90s Easter egg for you: In the premiere, we go from a scene with Kristy acknowledging that her mom — played by Alicia Silverstone — “isn’t totally clueless” (!) to a BSC meeting in which Claudia is wearing pants in that iconic Cher Horowitz yellow plaid.

The story: “Kristy is the one that was the simplest but the truest to the original look of her character, and maybe even of the movie,” Summers said.

“We wound up with a dress that really brought out a side of Kristy that she didn’t even know was there,” Summers said!

The look: Mary Anne has the biggest fashion evolution of all the girls, going from the almost parodically juvenile attire forced on her by her father to freer, more mature clothes that she actually gets to pick out for herself.

Even as Mary Anne found her new look, “we had to stay within our parameters of the original look of her … [but] show that she’s a young girl and not a baby.

The story: When we meet Mary Anne, her mom has died, and her dad has kept her in this state of suspended animation ever since: not comfortable letting her grow or evolve, struggling mightily to be a single parent to his daughter.

If she turned into a Claudia or Stacey, her dad would clearly never let her out the door.” So Mary Anne’s evolution is a little more subtle: “We took the silhouette and just made them a little more figure-flattering, for starters.

The look: Black, white, and pale (not millennial) pink

“She was the clearest for me: She needs to look like an out-of-towner,” Summers said

The story: Stacey needed to be “a little more sophisticated than the rest of the girls,” Summers said, “and her pieces needed to show that she had money: some designer pieces, some collector pieces.” It was all about “clean lines”: a motorcycle jacket, a tighter jean, great boots

And she’s in the mind-set of: I’m Stacey, and I dress as Stacey,” Summers said

The look: In the books, Dawn is Californian in the Sweet Valley High mold: she’s white, blonde, blue-eyed

The story: As one of two babysitters from outside Stoneybrook, Dawn gets to wear pieces that really set her apart from the other girls, who’ve all been shopping at the same mall basically all their lives