"Oh my God, do you want to see this new dress? Look, tell me if you like," Kim, 32, instructs Kourtney, 33, and Khloe, 28, in a sneak peek clip from the new episode. "Is this a good look for me? I've been struggling with clothes and designers."
"I think it looks fab," Kourtney says.
Styling a cleavage-baring black and tan halter-top dress with only one long sleeve, a black glove and sky-high heels, Kim continues her line of questioning. "But is the length good or do I need it longer if I have these shoes?" she asks. "These are seven-inch heels."
"The length is perfect," Khloe tells her. "It is tailored impeccably, you're fine."
"I'll move this over, and bring it up just a touch," Kim says while adjusting the top of the dress over her cleavage.
"Don't even question it, stop," Khloe snaps. "You're done."
"Kim is definitely a perfectionist and she always wants to look perfect," Kourtney explains in an interview. "Fashion is so subjective. You can't listen to everyone's opinion."
Kim is now expecting her first child with boyfriend Kanye West in July, and has been setting new trends with her maternity style. On March 21, she stepped out in a skin-tight, black leather skirt, sleeveless white blouse and a black fur stole while running errands in Beverly Hills.
Kourtney & Kim Take Miami airs Sundays at 9 p.m. EST on the E! network. Watch the video above and tell Us: What do you think of Kim's revealing ensemble?