Hi everyone! I'm considering ordering a pair of Lanvin flats, but I have no idea how the different materials stack up against each other. How do the leather, satin, patent leather, and silk/leather ones compare to each other in terms of sizing? I'm usually an 8 or 8.5, so I'm just wondering which size I should go for, depending on which pair of Lanvins I go with. TIA! 
