Khloé's signature jumper sells out in a day on

By Kate Hogan
Updated September 07, 2011 08:30 PM

Dimitrios Kambouris/Wireimage

She may have worn three Vera Wang wedding dresses when she married Kris Humphries last month, but Kim Kardashian says fashion should usually be about mixing high-end designer looks with more affordable pieces. Along with her sisters, the reigning reality TV princess is expanding her fashion empire with the Kardashian Kollection for Sears.

“I don’t think it’s really realistic to be able to have a really expensive, name-brand designers as every piece in your wardrobe,” Kim told PEOPLE at the New York City launch party Tuesday. “We’ll mix a little Kardashian Kollection blazer with some cute jeans, and maybe a nicer top. But it’s all about mixing and matching.”

Kourtney added, “That’s what I’m doing today — Sears with something expensive,” gesturing to her Casadei pumps. “But I also love our Kardashian Kollection shoes; they’re beyond comfortable. I’ll wear those with a little bit more expensive dress.”

For the line of clothes, shoes and accessories, the sisters said they found inspiration in everything from wallpaper to family heirlooms. “Our travels, something from our own closets, magazines, shopping — there’s so much in our lives that inspire our collection,” Kourtney explained. “Even the ring Kourtney is wearing was inspired by one of our grandmother’s rings,” Khloé added. “Anything could inspire us.”

For three sisters of very different styles and sizes, it was also important that the collection work with a range of body types. “We see pieces, and we think, ‘Oh my gosh, I love this, but I wish that it was like this,'” Kim said. “We have to get everything tailored, so in this collection, we wanted to make sure that you didn’t have to tailor anything. It was the exact way we like it — from the fabrics being very comfortable and stretchy to fitting all of our body types.”

The line launched Tuesday, and Khloé’s signature leopard-print jumper quickly sold out. “It’s because it was on my body [in the ads],” she said with a laugh. “Honestly, I could go to bed in that, it’s so comfortable.”

Collaborator Bruno Schiavi said that the sisters were involved with every step of the design process because they love making other women proud of their bodies. “They are the most stylish women in the world, and they embrace their curves,” he told PEOPLE. “Everything we’ve done comes really naturally to the girls. They’ve got an amazing sense of style.”

The Kardashian Kollection is available exclusively at Sears and will expand to denim in November, loungewear in October and home accessories in January.

–Asher Fogle