we all know how expensive it can be to find the perfect outfit, jewelry or bag. One group of friends came up with a fabulous solution. Sara Haines has the story. ♪ Reporter: Here's the story... See More
we all know how expensive it can be to find the perfect outfit, jewelry or bag. One group of friends came up with a fabulous solution. Sara Haines has the story. ♪ Reporter: Here's the story of a mom named Sasha who was looking for the perfect black shoe. Across the hall lived a mom named Dana who was looking for the perfect shade of blue. There was Rachel, who needed the perfect jewel. And another Dana who needed something cool. That's the way they all became the sharing crew. Now I heard you share clothes. How did this start, this concept? Basically started with an e-mail. Someone was e-mailing about wanting to bror a pair of shoes, size 7 black pumps and everybody responded so I'd say from that people just felt free to shoot an e-mail to the whole co-op to see if they needed anything. Reporter: In a city where oftentimes people don't even make eye contact, a group of moms in this grand street cooperative have taken neighborly kindness to a whole new level opening up their closets literally and sharing everything from dresses and shoes to accessories with the girl next door or down the hall. That is so cute. You can go in -- in someone's apartment in your slippers and sit down on their floor and check out their closets and walk out with a whole new wardrobe. Reporter: It just isn't for city gals. Talk to your friends and neighbors about swapping. After all, sharing is caring and the benefits of that closeness, well, clearly extend beyond mere friendship. ♪ it's like the ultimate form of recycling. Yes and save a lot of money. Reporter: Any excitement when someone new walks in and see look in the elevator who is well dressed and say I can totally find the occasion to wear that shirt. We have to get the scoop on the person first. Reporter: As for the million dollar question -- Worry someone is going to -- No, we know where you live. We know where they live. Reporter: For "Good morning America," Sara Haines, ABC news, New York.
This transcript has been automatically generated and may not be 100% accurate.