Our insoles come in M (up to 9.5 W in womens / 7.5 W in mens) or L (up to 13 W in mens).  To insure they are the EXACT size you want, we send you two pieces of felted wool.  You simply take the insole out of your shoe or boot, trace and cut them out.  Wonderful for stocking stuffers or just treat yourself.  Don't know their size?  That's OK--this will work. Your warm feet will thank you. *shipping & tax included*