The reality TV star, who is set to marry NBA player Kris Humphries on August 20, turned up at the boutique in a thigh-skimming plaid dress and black strappy heels.
Her close friend Jonathan Cheban, who runs his own PR firm, was on hand to give the star advice as she tried on her gown.
Here comes the bride: Kim Kardashian, who is set to wed on August 20, paid a visit to Vera Wang in New York today
'Vera has been a close family friend for a long time and we had talked about this moment for years,' Kardashian wrote on her blog on Monday.
'When it came to picking my wedding dress designer she was the first person I thought of. No one designs gowns the way she does!'
'I know that Vera can make my dream come true, and create the most perfect gown for my special day.'
While Kim will no doubt look gorgeous, her groom recently said he does not consider her the most beautiful woman in his life - that honour belongs to his mother.
Thighs the limit: The reality TV star wore a short plaid dress to the fitting
Meanwhile, Kim's bridesmaids, including younger sisters Kendall and Kylie, are still in the dark about what colour they will be wearing to the ceremony.
Asked about their dresses, Kylie said to Access Hollywood: 'She does [the choosing] for us. It's cool to all be matching. Like, if I was a bride, I'd want to pick my own [bridesmaids dresses] so everyone is matching.'
The girls were asked if they are worried about what Kim, 30, will choose for them.
Kendall said: 'Not with her.'
Preening: Kim visited a nail salon in Beverly Hills yesterday
While some details will remain a secret, her wedding day fragrance has already been revealed.
She will be saying 'I do' in a cloud of her scent, Love by Kim Kardashian.
And she hopes to cash in on her choice.
She told Us Weekly: 'My wedding day is going to be really special. My fragrance will be a keepsake I can keep for years, and I am excited to be able to share it with my fans.'
The $100 dollar perfume comes in a crystal-encrusted glass bottle, of which there just 1,000 were made - one for Kim, 200 for her wedding guests and 799 for her fans.
Cameras are set to record the couple's big day for a two-part E! special titled Kim's Fairytale Wedding: A Kardashian Event, which will air in October.