From the Designer:Lambskin Insole & Soft LeatherBallet Flats: 0.6 inch & Come a Set of Heel GripsSquare Toe & Bows Ballet: These women's flats are designed provide more room with considered cushioned foot-bed, for ultimate comfort flatsFlats Shoes: These flats crafted with lambskin inner sole and our new launch- vegan leather outer that provided ultimate comfort from day to dark with easeIn a world that makes us choose between comfort and style, C.Paravano is an invitation to go comfortably, stylishly, and confidently--------------------------------------------------------I actually have several pairs of flats from C.Paravano, so believe me when I tell you these run big. I usually wear a size 7.5 in flats and an 8 in heels in every other brand, but in this brand, specifically, I wear a 6.5. These are also quite comfortable and have a very generous toe box so you feet are not crammed up into a roach killer point.Please feel free to ask any questions and/or make an offer! All items ordered before noon PST Mon - Fri will ship same day, everything else ships next business day. Thank you for stopping in!