AS MOST LADIES KNOW , THE SIZING WITH SHOES VARIES FROM SHOEMAKER TO SHOEMAKER WHICH IS WHY I HAVE ENDEAVOURED TO INCLUDE AN INSOLE MEASUREMENT WHEN LISTING MY STOCK. WHAT IS AN INSOLE MEASUREMENT ? THIS IS YOUR INNER LEGNTH. THE OUTSOLE LEGNTH IS NOT IMPORTANT AS SOME OUTSOLES ARE RANDED AND CHUNKY. IT IS THE INSOLE THAT WILL GUIDE YOU TO WHETHER A SHOE WILL FIT OR NOT. WIDTH TOO IS IMPORTANT , ESPECIALLY TO LADIES WHO KNOW THEY HAVE A NARROWER OR WIDER THAN STANDARD FOOT , BUT IT IS THE INNER LEGNTH THAT IS WHAT I WORK WITH , MOST OF MY REGULAR CUSTOMERS WHO ARE AWARE THAT THEY NEED NARROWER OR WIDER USUALLY CONTACT ME PRIOR TO PURCHASE FOR MY ADVISE. TO CALCULATE YOUR OWN INSOLE MEASUREMENT IS EASY BUT KEEP IN MIND THIS TOO CAN VARY DEPENDING ON THE HEEL HEIGHT. I RECCOMEND THAT IF YOU ARE LOOKING AT A SANDAL IN MY STORE THAT YOU FIND ONE ON A SIMILAR HEEL HEIGHT IN YOUR WARDROBE AND THEN PLACE A TAPE MEASURE WITH THE METAL TIP AT THE TOE , WALK YOUR FINGERS TO THE MIDDLE AND REST , THEN WALK YOUR FINGERS TO THE HEEL. THIS WILL BE YOUR INSOLE MEASUREMENT.  IF YOU ARE LOOKING AT A CLOSED TOE SHOE THEN CHOOSE A CLOSED TOE SHOE. VIEW MY FEEDBACK TO SEE THAT THIS SYSTEM WORKS , I HAVE MANY HAPPY CUSTOMERS HAPPY MEASURING AND HAPPY 2010 ... KATHIE HALL.