You can order them through Amazon and return them if they do not fit.
http://www.amazon.com/gp/aw/d/B001IOLGH8/ref=mp_s_a_1_3?qid=1435288414&sr=8-3&pi=AC_SY200_QL40&keywords=red+wing+boots&dpPl=1&dpID=41mVFhHoY8L&ref=plSrch