Kim revealed their plans while she featured on chat show Jimmy Kimmel Live!, reports contactmusic.com.
"If anyone knows Kanye, they just know how into fashion he is, and I think he's going to have things, like, specially made. I don't think hand-me-downs are going to work. I think it has to be, like, really fun stuff," said Kim.
Asked what fashion-forward items will the child wear, Kim said: "Chains... leather pants!"
While the baby was unplanned, Kim confessed that Kanye, 35, is over the moon about becoming a father for the first time.
"We talked about it, but it was a nice surprise... He is so excited, it's really cute how excited he is."
The 32-year-old also revealed she is scheduled for a scan in a couple of weeks' time and the couple is dying to find out the sex of the baby.