Which leather stretcher did you use? I have a pair of flats I need to stretch!Hi, I just had the same experience and trusted the SA. I've bought one pair of 39.5 in store and one that I'm hopping to have authenticated (the authenticator seems busy, love her, but am hoping she considers me today!). The ones from the store have already given quite considerably but I did spray them with a high quality leather stretcher and wore thick socks around my house for a few hours. That worked a charm! Recommended by my awesome cobbler who is an Italian shoe maker who has moved to the UK. Hope it helps you decide!