I ordered the Naughty Monkey Women's Detective Boot in size 8.5M in gray. The boots are suede, and the shaft is approx. 14.5 inches from the arch. The boot heel is approx. 2.5 inches, and the opening is approx. 15" around. I have large calves, and the boots fit well, even with skinny jeans. Unfortunately, the soles are extremely uncomfortable. I purchased inserts, and removed the sole (which peeled right out, and had no padding), and the boots are a bit more comfortable. But, I attempted to wear the boots several times before replacing the soles, and became discouraged, now the boots sit in my closet.