I purchased these in a retail store, not on amazon. But amazon's description says they are leather, but they are man made.  I have them right in front of me and it says so right on eht boots.  If these were leather, I would love them!  But the material does seem a little cheap.  Even so, I still like them enough to give 4 stars.  I think they run true to size.  I wear a 6 1/2 or a 7 and the 6 1/2 fits perfectly. A 7 would probably be fine with thick socks. My calves are average, and the calves on these fit fine, not too loose.  I believe ther is enough room to tuck in jeans, but I honetly haven't tried that yet.  It's been in the 80's and 90's here for months!