Get an exclusive look inside Etsy’s 200,000-square-foot headquarters in Dumbo, including a sneak peek of their merchandise closet. “No one has ever been back here. I’m barely allowed back here,” Etsy exec Raina Moskowitz dished to The Post. The craft-centric e-commerce giant was actually founded in Brooklyn in 2005, and two decades later, Etsy is “doubling down” on the borough famous for its local artisans and creative talent. Shoppers may also be surprised to learn Beyoncé’s iconic disco ball cowboy hat was an Etsy product from Philadelphia-based seller Abby Misbin. Find out how Taylor Swift, actress Amanda Seyfried, and Drew Barrymore are having an Etsy moment.