Hello Darcie, if you order standard size now (about 2~3 weeks making costume time) and use the fastest shipping method (Premium Express, 3-6 days shipping time), we can hurry up the costume making time to reach you before 26th October, but we cannot 100% guaranteed the exact delivered date, hope you can understand. (n__n)
P.S.1. All shipping information (including methods, cost & estimated delivered date) will be shown in order page, before payment; you can pay extra cost to upgrade shipping method there.
P.S.2. Please remember to mark down the date (you need it) in the order form when you order it. :)