buy a pair at local shoe store , full price , but wonderful service , i.e. , help in get exact right size and style . this be my second pair buy at Amazon at a price which better suit my pocketbook . know my size really help . I do not usually find it very satisfy to buy shoe on-line because of the size issue . keep those Birkis come Amazon ! you service be great with free 2 day shipping for prefer customer like I ! I recommend Birkis for anyone with low arch , flat foot , who need a good supportive platform . they be wonderful as footwear around the house when soft but unsupportive slipper will not do ! wear they with wool sock when it be cold .