Jenner, 65, posted a WhoSay video Wednesday from inside her closet, panning to give fans a peek at her impressive collection of footwear.
"Don't get jealous, Khloé! It's filling up," she teases equally fashionable stepdaughter Khloé Kardashian.
The Olympic icon has partnered with WhoSay to release a weekly series of editorials chronicling her journey after transitioning from male to female. Her latest post – also published on PEOPLE.com – centered on her widely praised speech at the ESPY awards last week.
Jenner's docuseries I Am Cait premieres Sunday at 8 p.m. ET on E!.