Vintage Marc Alpert brown leather riding boots, size women's 10M.  Not sure of the decade but I'm guessing 80s-90s?  These were mine and I haven't worn them in years.  They have some lifting of the leather part of the bottom, wear on the heels, some warping/marks on the leather. They also won't stand up straight, the shafts have been flattened for years so you may need some boot trees to reshape again and the leather could use some conditioning.  They are in pretty decent condition for their age.  Height from heel to top of shaft is approximately 16 inches, 8 inches across top of shaft and 6 inches across ankle/lower calf area.