Costco Sale: DKNY Ladies Knee High Boot Socks 3-Pairs $7.99 by Rhonda July 16, 2020 11/17/16. This is from the Costco Pre-Black Friday Holiday Sale: November 18 – 23, 2016, but it’s also already on sale. Costco has DKNY Ladies Knee High Boot Socks 3-Pairs … 0 FacebookTwitterPinterestEmail