I am a size 10-10.5 and the 41 fits perfectly. I have loved these shoes but now that I WFH, I rarely wear them. They were recently brought to a cobbler to be cleaned, polished and added the anti slip sole. If you have worn Gucci mules or loafers before you know how essential this is, they can be quite slippery! I have included a picture of my shipping confirmation from Bloomingdale’s to ensure that these are 100% authentic. An essential Gucci style since its debut in the Fall Winter 2015 fashion show, the Princetown slipper is presented in black leather. The mule design features the distinctive gold-toned Horsebit, an archival symbol inspired by the equestrian world. Black leather Women's Horsebit detail Leather sole Flat .4" heel