The 36-year-old reality star and 39-year-old rapper and designer will release their children's clothing line, The Kids Supply, on Friday, May 5.
"Our kids line TheKidsSupply.com drops tomorrow at 12 noon PST," Kardashian tweeted Thursday to her 51.3 million followers.
"For the past few years Kanye and I have made almost all our kids clothes and we have collaborated on a new kids line!" she added. "TheKidsSupply has been what we've been working on for a long time. I'm so excited about this!"
Kardashian announced plans for The Kids Supply in February by having daughter North model some pieces from the collection on Snapchat. She shared a photo of North wearing a shearling jacket and a sequined dress the toddler helped design.
Kardashian previously launched a Kardashian Kids line with sisters Kourtney and Khloe Kardashian in 2014, and has released several other fashion collections. West, meanwhile, launched his Yeezy clothing line in 2015.
"I took a lot of direction from my husband when he introduced me more to the fashion world. And now I love taking risks," Kardashian told The Huffington Post in 2015. "So I would encourage North to be herself and wear what she thinks she looks good in."
Kardashian and West share 3-year-old North and 17-month-old son Saint West.