I have very small feet (I buy children's size 2 or adult 4 1/2 for flat shoes).
I bought size 5M and they are perfect with my winter stockings. I tried without stockings and they are still comfortable because of the insole cushion. I also love the design. They are good for jeans, any dress pants and skirts. The heels are about 5-6cm(2inches) but I can't even feel them because they are so comfortable! The leather is also soft and good quality that I didn't even get a single blister after my first day of trying.