Zac Posen Limited Edition Barbie & Ken Dolls

Brand extension takes a turn to the smaller side but then, as Richard Feynman remarked back in 1959, "There's plenty of room at the bottom."

But I digress.

Posen is among the most sought-after designers in the world today, dressing many of the presenters and nominees on Oscar night.

Now he's turned his attention to Mattel's power couple, creating wardrobes to glam them up in time for the holiday party season.

The limited-edition (999 were made) two-doll set went on sale at FAO Schwarz last week for $300 and as of 8:36 p.m. ET last evening they were still available.

"Ken wears a silk blazer and Earnest Sewn jeans, while Alexandra Barbie — in the likeness of Mr. Posen's sister, Alexandra — wears a violet pleated gown and a snake-like armband," wrote Suzanne Gannon in yesterday's Wall Street Journal article.

Bonus: each set includes a miniature dog and tiny accesories from Posen's atelier.