Taking the internal measurements of the shoe approximately
N3 = 4 1/2 inch
N4 = 4 3/4 in
N5 = 5 1/8 in
N6 = 5 3/8 in
synthetic upper materials, faux fur and round speckled laces. There is an eva cushion sock for added support and soft textile linings. This shoe is water resistant and available in full size range for Prewalk.