Kmart cuts 40% off select infant and toddler Halloween costumes. Plus get an extra 10% off via coupon code "KMART10PSAVINGS". With deals starting at $8.63 after coupon, that's the best discount we've seen on these items at Kmart. Opt for in-store pickup (when available) to save on shipping, which starts at $5.99. (Get free shipping on most orders of $49 or more.) Some exclusions apply, and sales tax is added where applicable.
A best bet is the Totally Ghoul Toddlers' Pumpkin Vest Halloween Costume (pictured) for $14.99 before the above coupon, $13.49 after. With pickup, that's $12 off list and the lowest price we could find. It fits sizes 1T and 2T.